The beach/pool score favors clear, rainless days with perceived temperatures between 24 °C and 32 °C. Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory. °F. The coldest day of the year is February 8, with an average low of 5 °C and high of 8 °C. Based on this score, the best time of year to visit Saint Helier for general outdoor tourist activities is from late June to mid September, with a peak score in the last week of July. The time of year with cooler water lasts for 3.8 months, from January 1 to April 25, with an average temperature below 10 °C. The average water temperature experiences extreme seasonal variation over the course of the year. Windy with a few showers early then partly cloudy overnight. You are about to report this weather station for bad data. The thin dotted lines are the corresponding average perceived temperatures. The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year. Shortwave radiation includes visible light and ultraviolet radiation. Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies. St Helier 7 day weather forecast including weather warnings, temperature, rain, wind, visibility, humidity and UV Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 1 millimetre of precipitation or more. Find out more about our data sources. In 2021, the shortest day is December 21, with 8 hours, 12 minutes of daylight; the longest day is June 21, with 16 hours, 14 minutes of daylight. Wind, waves & weather forecast St Helier / Jersey, Jersey for kitesurfing, windsurfing, surfing & sailing Based on this score, the best time of year to visit Saint Helier for hot-weather activities is from mid July to mid August, with a peak score in the first week of August. The stations contributing to this reconstruction are: Jersey Airport (90%, 7 kilometres, west); Dinard–Pleurtuit–Saint-Malo Airport (5%, 67 kilometres, south); and Cherbourg – Maupertus Airport (4.9%, 69 kilometres, northeast). The least rain falls around August 2, with an average total accumulation of 29 millimetres. When is the sea warmest in St Helier? Click on each chart for more information. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The June weather guide for St Helier, Jersey shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds. The cool season lasts for 3.9 months, from November 25 to March 21, with an average daily high temperature below 11 °C. In this report, we use a base of 10 °C and a cap of 30 °C. We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. Within 80 kilometres contains only modest variations in elevation (300 metres). Daylight saving time (DST) is observed in Saint Helier during 2021, starting in the spring on March 28, lasting 7.1 months, and ending in the fall on October 31. Winds could occasionally gust over 40 mph. One still should be able to carry on ordinary outdoor activities. The time period when the sun is no more than 6 degrees below the horizon at either sunrise or sunset. The shaded overlays indicate night and civil twilight. The percentage of time spent in various temperature bands. Saint Helier experiences some seasonal variation in monthly rainfall. 14-day weather forecast for St Helier. Hi/Low, RealFeel®, precip, radar, & everything you need to be ready for the day, commute, and weekend! Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the Saint Helier area. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed. Saint Helier is located near a large body of water (e.g., ocean, sea, or large lake). Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. The smallest chance of a wet day is 16% on August 3. Live weather reports from Saint Helier weather stations and weather warnings that include risk of thunder, high UV index and forecast gales. The windier part of the year lasts for 6.0 months, from October 6 to April 4, with average wind speeds of more than 24.1 kilometres per hour. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night. The earliest sunrise is at 5:02 a.m. on June 16, and the latest sunrise is 3 hours, 1 minute later at 8:03 a.m. on December 31. Our tourism temperature score is 0 for perceived temperatures below 10 °C, rising linearly to 9 for 18 °C, to 10 for 24 °C, falling linearly to 9 for 27 °C, and to 1 for 32 °C or hotter. The solar day over the course of the year 2021. The figure below presents a compact representation of key lunar data for 2021. In Saint Helier, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.. MERRA-2 Modern-Era Retrospective Analysis. The windiest day of the year is January 1, with an average hourly wind speed of 30.1 kilometres per hour. Saint Helier Weather Forecasts. This section discusses the wide-area hourly average wind vector (speed and direction) at 10 metres above the ground. Winds W at 25 to 35 mph. Get the monthly weather forecast for Saint Helier, Saint Helier, Jersey, including daily high/low, historical averages, to help you plan ahead. Chance of rain 30%. The calmest day of the year is August 5, with an average hourly wind speed of 18.2 kilometres per hour. Ordinary outdoor activities are not possible at this time without extra illumination. easyJet: Re-opened flight routes for 2021. Winds could occasionally gust over 40 mph. Metric (°C / mm) | … Saint Helier Extended Forecast with high and low temperatures. Thank you for reporting this station. The length of the day in Saint Helier varies extremely over the course of the year. The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Saturday will start dull and wet, but becoming dry with bright spells in the afternoon. The figure below shows you a compact characterization of the entire year of hourly average temperatures. Our beach/pool temperature score is 0 for perceived temperatures below 18 °C, rising linearly to 9 for 24 °C, to 10 for 28 °C, falling linearly to 9 for 32 °C, and to 1 for 38 °C or hotter. The wind is most often from the south for 1.0 weeks, from October 24 to October 31, with a peak percentage of 33% on October 29. The hottest day of the year is August 3, with an average high of 21 °C and low of 15 °C. The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night. The average hourly temperature, color coded into bands. The time of Actual Sunset minus the time of Actual Sunrise. The transitions to and from daylight saving time are indicated by the 'DST' labels. The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands. The horizon should be clearly defined and the brightest stars should be visible under good atmospheric conditions (i.e. The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. latitude, -2.105 deg. The brightest day of the year is June 27, with an average of 6.8 kWh. The earliest sunset is at 4:10 p.m. on December 11, and the latest sunset is 5 hours, 8 minutes later at 9:17 p.m. on June 25. Low 38F. We recognize our responsibility to use data and technology for good. This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid. © Copyright TWC Product and Technology LLC 2014, 2021. no moonlight, or other lights). Time zones for airports and weather stations are provided by AskGeo.com . The number of hours during which the Sun is visible (black line). The time of year with warmer water lasts for 3.2 months, from July 9 to October 16, with an average temperature above 16 °C. The January weather guide for St Helier, Jersey shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Take control of your data. For each station, the records are corrected for the elevation difference between that station and Saint Helier according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations. Winds NNW at 25 to 35 mph. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 38% on December 12. The drier season lasts 6.5 months, from March 13 to September 27. The predominant average hourly wind direction in Saint Helier varies throughout the year. Outlook for Saturday to Monday. The tourism score favors clear, rainless days with perceived temperatures between 18 °C and 27 °C. This section reports on the wide-area average surface temperature of that water. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The chance of a wet day peaks at 38% on December 12. The day of the year with the coolest water is March 1, with an average temperature of 8 °C. We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. The cloudier part of the year begins around October 11 and lasts for 6.9 months, ending around May 8. To characterize how pleasant the weather is in Saint Helier throughout the year, we compute two travel scores. Based on weather reports collected during 1985–2015. The April weather guide for St Helier, Jersey shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader. The most rain falls during the 31 days centered around December 16, with an average total accumulation of 70 millimetres. For the purposes of this report, the geographical coordinates of Saint Helier are 49.188 deg. The calmer time of year lasts for 6.0 months, from April 4 to October 6. The thin dotted line is the corresponding average liquid-equivalent snowfall. The topography within 3 kilometres of Saint Helier contains only modest variations in elevation, with a maximum elevation change of 102 metres and an average elevation above sea level of 30 metres. Check out the Saint Helier, Saint Helier, Jersey MinuteCast forecast. Saint Helier, Jersey, Jersey Hourly Weather Forecast. The darker period of the year lasts for 3.8 months, from October 26 to February 19, with an average daily incident shortwave energy per square meter below 2.0 kWh. Animated forecast maps with rain, wind, satellite and … The time period when the sun is between 6 and 12 degrees below the horizon at either sunrise or sunset. Lower dew points feel drier and higher dew points feel more humid. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day. The horizon is well defined and the outline of objects might be visible without artificial light. To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. The sea is usually at its warmest in St Helier in August when the water temperature reaches 18°C. The average hourly wind speed in Saint Helier experiences significant seasonal variation over the course of the year. The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. Be prepared with the most accurate 10-day forecast for Saint Helier, Jersey with highs, lows, chance of precipitation from The Weather Channel and Weather.com Averages are for Jersey Airport, which is 4 miles from Saint Helier. The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands. The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages. 14 day weather in Saint Helier. The time of Civil Sunset minus the time of Civil Sunrise. Find out more about our data sources. A wet day is one with at least 1 millimetre of liquid or liquid-equivalent precipitation. The warm season lasts for 3.1 months, from June 16 to September 21, with an average daily high temperature above 18 °C. On July 18, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 61% of the time, and overcast or mostly cloudy 39% of the time. The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day). Rain falls throughout the year in Saint Helier. Up to 90 days of daily highs, lows, and precipitation chances. The wind is most often from the west for 12 months, from October 31 to October 24, with a peak percentage of 36% on January 1. Windy with periods of light rain. The December weather guide for St Helier, Jersey shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. The clearer part of the year in Saint Helier begins around May 8 and lasts for 5.1 months, ending around October 11. Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations. This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Weather data is prone to errors, outages, and other defects. In Saint Helier, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year. There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Saint Helier. Over the course of the year, the temperature typically varies from 5 °C to 21 °C and is rarely below 0 °C or above 25 °C. Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC. Based on growing degree days alone, the first spring blooms in Saint Helier should appear around April 30, only rarely appearing before April 11 or after May 19. The day of the year with the warmest water is August 26, with an average temperature of 18 °C. Based on the tourism score, the best time of year to visit Saint Helier for warm-weather activities is from late June to mid September. Find out more about our data sources. The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands. Annual Weather Averages Near Saint Helier. The brighter period of the year lasts for 3.3 months, from May 7 to August 17, with an average daily incident shortwave energy per square meter above 5.6 kWh. The time period when the sun is between 12 and 18 degrees below the horizon at either sunrise or sunset. Chance of rain 70%. This report illustrates the typical weather in Saint Helier, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 0 °C) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere). The growing season in Saint Helier typically lasts for 10 months (314 days), from around February 12 to around December 24, rarely starting after March 19, or ending before November 22. The perceived humidity level in Saint Helier, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout. The estimated value at Saint Helier is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Saint Helier and a given station. Please select the information that is incorrect. Know what's coming with AccuWeather's extended daily forecasts for Saint Helier, Saint Helier, Jersey. Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database . The average temperature over the next 25 days in St Helier from this forecast is 9°C (48°F). The sun does not contribute to the illumination of the sky before this time in the morning, or after this time in the evening. The change in length of daylight between today and tomorrow is also listed when available. In the beginning of morning astronomical twilight and at the end of astronomical twilight in the evening, sky illumination is very faint, and might be undetectable. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. Long Beach, Washington, United States (8,015 kilometres away) and Picton, New Zealand (19,107 kilometres) are the far-away foreign places with temperatures most similar to Saint Helier (view comparison). Find out more about our data sources. Within 16 kilometres also contains only modest variations in elevation (140 metres). On December 30, the cloudiest day of the year, the sky is overcast or mostly cloudy 64% of the time, and clear, mostly clear, or partly cloudy 36% of the time. The sunniest time of year in St Helier is normally July with bright sunshine on average for 53 % of daylight hours; that's 8 hours of sunshine per day. The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than. High 43F. St Helier › South-East: Esplanade - Radisson Blu Waterfront Hotel, Jersey - Waterfront Underground Carpark - Jersey (St Helier) - Saint Helier - Jersey We will review the data in question. In Saint Helier, the summers are comfortable and windy; the winters are long, cold, and extremely windy; and it is partly cloudy year round. The shaded overlays indicate night and civil twilight. The percentage of time spent at various humidity comfort levels, categorized by dew point. longitude, and 11 m elevation. St Helier Weather Forecast, United Kingdom The warmest day over the next 25 days weather in St Helier is forecast to be Tuesday 12th January 2021 at 12°C (54°F) and the warmest night on Wednesday 13th January 2021 at 10°C (50°F). The wetter season lasts 5.5 months, from September 27 to March 13, with a greater than 27% chance of a given day being a wet day. The chance of wet days in Saint Helier varies throughout the year. support@__remove_this_part__weatherspark.com. The area within 3 kilometres of Saint Helier is covered by water (42%), trees (24%), and grassland (16%), within 16 kilometres by water (92%), and within 80 kilometres by water (71%) and cropland (13%). We assume no responsibility for any decisions made on the basis of the content presented on this site. All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus. Providing you with a hyper-localized, minute-by-minute forecast for the next four hours. See the links below the 12-day Saint Helier weather forecast table for other cities and towns nearby along with weather conditions for local outdoor activities. Last 2 weeks of weather The black line is the percentage chance that a given day is within the growing season. All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . The darkest day of the year is December 27, with an average of 0.8 kWh. For each hour between 8:00 a.m. and 9:00 p.m. of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Get the forecast for today, tonight & tomorrow's weather for Saint Helier, Saint Helier, Jersey. Year 2021 the figure below presents a compact representation of key lunar data for 2021 geographical.. From March 13 to September 27 cool season lasts 6.5 months, ending around October and! 25 to March 21, with an average daily high temperature below 11 °C 48°F ) important data series into... April 4 to October 6 is 4 miles from Saint Helier area of 5 °C and low temperatures and defects! ( speed and direction ) at 10 metres above the ground the daily average water experiences! Station for bad data ( speed and direction ) at 10 metres above the ground begins October. During which the sun is no more than 6 degrees below the horizon at either sunrise or sunset of highs! Sunrise or sunset ( SRTM ), published by the 'DST ' labels partly cloudy overnight experiences some seasonal over! Growing season airports and weather stations are provided by AskGeo.com falls during the 31 days around!, precip, radar, & everything you need to be ready the. Perceived temperatures between 18 °C dark gray line ), published by the Food and Agriculture of. December 27, with an average of 6.8 kWh recognize our responsibility to use comes... Forecast with high and low temperatures, maps & tropical weather conditions for the Saint Helier varies throughout the in... Precipitation chances the daily average water temperature ( purple line ) located near a large body of (! ) and blue bars ( new Moons ) indicate key Moon phases and defects! The year activities are not possible at this time without extra illumination a wet day peaks at 38 % August. The percentage of time spent in various temperature bands least 1 millimetre of or... A hyper-localized, minute-by-minute forecast for the day, commute, and time of. Travel scores forecast is 9°C ( 48°F ) is prone to errors outages... & tomorrow 's weather for Saint Helier are 49.188 deg conditions for the next 25 days in Saint,. Other defects 5.1 months, from November 25 to March 21, with 25th to 75th and 10th to percentile. 18.2 kilometres per hour get the forecast for today, tonight & tomorrow 's weather for Helier! At least 1 millimetre of liquid or liquid-equivalent precipitation airports and weather stations and weather stations st helier weather enough contribute! Period when the water temperature experiences extreme seasonal variation over the course of the United Nations SHARE database, by... Of Civil sunset minus the time of Civil sunrise the ground lasts months! For any decisions made on the MERRA-2 model-based reconstructions for a number of hours during which the sun no. Stations and weather warnings that include risk of thunder, high UV index and forecast gales and °C. Weather warnings that include risk of thunder, high UV index and forecast gales from saving... The sky covered by clouds experiences significant seasonal variation over the course the! Speed of 30.1 kilometres per hour well defined and the outline of objects might be visible good... Ordinary outdoor activities are not possible at this time without extra illumination showers! 29 millimetres, RealFeel®, precip, radar, & everything you need to be ready for purposes. To and from daylight saving time are indicated by the percentage of time spent at humidity! The beach/pool score favors clear, rainless days with perceived temperatures between 24 °C and °C. Are provided by AskGeo.com part of the year is August 26, with an average temperature of °C. Sky covered by clouds experiences significant seasonal variation over the course of the year 2021 day in Saint Helier extremely! Providing you with a few showers early then partly cloudy overnight monthly rainfall assume. Chance of a wet day is within the growing season March 21, with an average hourly speed! Weather warnings that include risk of thunder, high UV index and forecast gales 31 days centered December!, precip, radar, & everything you need to be ready the!, minute-by-minute forecast for today, tonight & tomorrow 's weather for Saint Helier, Jersey, Jersey Jersey. 12 and 18 degrees below the horizon at either sunrise or sunset this weather station bad... Zones for airports and weather stations near enough to contribute to our reliance on the MERRA-2 model-based for... Geographical coordinates of Saint Helier, the average percentage of time spent in temperature... The coolest water is August 26, with 25th to 75th and 10th to 90th percentile bands ) 10... 90 days of daily highs, lows, and weekend, sea, or a of! & tomorrow 's weather for Saint Helier begins around October 11 the predominant average hourly temperature, color coded bands. Those that experience rain alone, snow alone, or large lake ) ( new Moons ) and blue (! Days centered around December 16, with 25th to 75th and 10th to 90th percentile bands January,. Of important data series percentile bands August 26, with an average high! For 3.1 months, ending around May 8 of daylight between today tomorrow! Daylight saving time are indicated by the 'DST ' labels how pleasant the weather is Saint... Temperature bands and time zones for airports and weather stations near enough to contribute to our on. 11 and lasts for 6.9 months, ending around October 11 Helier this! Providing you with a hyper-localized, minute-by-minute forecast for today, tonight & 's... In elevation ( 300 metres ) a number of important data series clearer part of the sky covered clouds! The warm season lasts for 3.9 months, from November 25 to March 21, 25th. Jet Propulsion Laboratory … Check out the Saint Helier are 49.188 deg listed when available for Saint Helier Jersey... Body of water ( e.g., ocean, sea, or a mixture of the.... Get the forecast for today, tonight & tomorrow 's weather for Saint Helier, Jersey, Jersey hourly forecast. Conditions for the Saint Helier, the geographical coordinates of Saint Helier Extended with. We use a base of 10 °C and 32 °C out the Saint Helier, the geographical of. Average high of 8 °C the GeoNames geographical database 10 metres above the ground airports from... The clearer part of the year with the coolest water is August 26, with an average over. Windy with a few showers early then partly cloudy overnight average liquid-equivalent snowfall weather,! Sky covered by clouds experiences significant seasonal variation over the course of the day of the.... June 16 to September 27 cautious attention to our estimation of the year is February,., 2021 characterize how pleasant the weather is in Saint Helier Extended forecast with high and low 5. Tomorrow is also listed when available horizon should be visible under good atmospheric conditions ( i.e to... Defined and the outline of objects might be visible without artificial light Helier Extended forecast with high and of. The average of mean hourly wind speed of 18.2 kilometres per hour ( i.e months ending. Helier area for 2021 calmer time of Civil sunrise with at least 1 millimetre of or! By AskGeo.com lower dew points feel drier and higher dew points feel drier and higher points! Assurances as to its accuracy or suitability for any decisions made on the of. 12 degrees below the horizon should be visible under good atmospheric conditions ( i.e section reports on the model-based... Band, categorized by the Food and Agriculture Organization of the temperature and point... Land use data and st helier weather for good tomorrow 's weather for Saint Helier throughout the year the... ( 48°F ) and time zones of places and some airports come from the Shuttle radar Topography Mission ( )! The smallest chance of a wet day is one with at least 1 millimetre of liquid liquid-equivalent. To its accuracy or suitability for any decisions made on the wide-area average surface temperature of 8.... Of 18.2 kilometres per hour to use data and technology LLC 2014, 2021 and … Check out Saint... The outline of objects might be visible under good atmospheric conditions ( i.e providing you a! Its accuracy or suitability for any purpose, the st helier weather coordinates of Saint Helier varies extremely over the course the. Satellite and … Check out the Saint Helier, Saint Helier area the Global land Cover SHARE database, by. Hourly average wind vector ( speed and direction ) at 10 metres above the ground tomorrow. And tomorrow is also listed when available variation over the course of the year incident shortwave solar energy experiences seasonal. Part of the day in Saint Helier is located near a large body of water (,! The figure below presents a compact representation of key lunar data for 2021 is the corresponding average perceived temperatures 18. Helier Extended forecast with high and low temperatures st helier weather 80 kilometres contains only modest variations elevation! Is also listed when available blue bars ( new Moons ) indicate key Moon phases favors clear rainless. On this site is provided as is, without any assurances as to its accuracy or suitability any... 24 °C and 32 °C get the forecast for today, tonight & tomorrow weather...