Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 41% on December 30. Dec January 2021 . 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. On average, it rains or snows a fair amount: 5 to 6 times per month. 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. In Guernsey, the summers are hot and mostly clear; the winters are very cold, windy, and partly cloudy; and it is dry year round. The main islands are Jersey, Guernsey and Alderney. 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 average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands. Based on this score, the best time of year to visit Guernsey Airport for general outdoor tourist activities is from late June to mid September, with a peak score in the last week of July. The average water temperature experiences some seasonal variation over the course of the year. The cloudier part of the year begins around October 12 and lasts for 5.6 months, ending around March 31. Even the driest month still has a lot of rainfall. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The day of the year with the warmest water is August 28, with an average temperature of 62°F. The day least likely to be in the growing season is January 16, with a 59% chance. 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. 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. On July 24, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 57% of the time, and overcast or mostly cloudy 43% of the time. August is the hottest month in Guernsey with an average temperature of 16.5°C (62°F) and the coldest is February at 5.5°C (42°F) with the most daily sunshine hours at 8 in July. Get the monthly weather forecast for Guernsey, WY, including daily high/low, historical averages, to help you plan ahead. The average high during this season is between 50.4°F (10.2°C) and 45.5°F (7.5°C). The average hourly wind speed at Guernsey Airport experiences extreme seasonal variation over the course of the year. 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. A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. Long Beach, Washington, United States (4,954 miles away); Scottsdale, Australia (10,897 miles); and Upper Hutt, New Zealand (11,863 miles) are the far-away foreign places with temperatures most similar to Saint Peter Port (view comparison). The chance of wet days in Saint Peter Port varies throughout the year. The percentage of time spent in various temperature bands. The time of year with cooler water lasts for 3.9 months, from January 8 to May 4, with an average temperature below 51°F. The black line is the percentage chance that a given day is within the growing season. 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. Click on each chart for more information. Weather data is prone to errors, outages, and other defects. The clearer part of the year in Saint Peter Port begins around March 31 and lasts for 6.4 months, ending around October 12. Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory. The climate of Guernsey is oceanic, cool and humid throughout the year. Time zones for airports and weather stations are provided by AskGeo.com . Based on this score, the best time of year to visit Saint Peter Port for general outdoor tourist activities is from late June to mid September, with a peak score in the first week of August. Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the Guernsey area. The shaded overlays indicate night and civil twilight. In this report, we use a base of 50°F and a cap of 86°F. The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. Average Weather in St Martin Guernsey. Consider visiting Guernsey in the months of June, July, August, September, for the best beach weather.Also consider one of our other suggestions for August. The climate here is classified as BSk by the Köppen-Geiger system. Based on this score, the best time of year to visit Saint Peter Port for hot-weather activities is from mid July to mid August, with a peak score in the first week of August. Shortwave radiation includes visible light and ultraviolet radiation. Guernsey Airport experiences significant seasonal variation in monthly rainfall. The earliest sunset is at 4:10 PM on December 12, and the latest sunset is 5 hours, 10 minutes later at 9:20 PM on June 25. Saint Peter Port experiences significant seasonal variation in monthly rainfall. The thin dotted line is the corresponding average liquid-equivalent snowfall. 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 information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. The average water temperature experiences some seasonal variation over the course of the year. Get the monthly weather forecast for Guernsey, WY, including daily high/low, historical averages, to help you plan ahead. The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands. The earliest sunset is at 4:10 PM on December 11, and the latest sunset is 5 hours, 10 minutes later at 9:20 PM on June 26. Last updated today at 19:50. The transitions to and from daylight saving time are indicated by the 'DST' labels. Annual Weather Averages. MERRA-2 Modern-Era Retrospective Analysis. 2020 has been hailed as a “truly remarkable” weather year after featuring the sunniest spring and the wettest February on record. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. The figure below shows you a compact characterization of the entire year of hourly average temperatures. The shaded overlays indicate night and civil twilight. The solar day over the course of the year 2021. In Enero, the average high-temperature is practically the same as in Diciembre - a still frosty 8.7°C (47.7°F). Services. The time of year with cooler water lasts for 3.9 months, from January 8 to May 4, with an average temperature below 51°F. There is little rainfall throughout the year. The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands. The chance of a wet day peaks at 41% on December 30. Weather warnings issued. 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. The area within 2 miles of Saint Peter Port is covered by water (67%) and trees (18%), within 10 miles by water (95%), and within 50 miles by water (93%). Get the forecast for today, tonight & tomorrow's weather for Channel Islands Beach, CA. For each station, the records are corrected for the elevation difference between that station and Saint Peter Port according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations. 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. The earliest sunrise is at 5:03 AM on June 16, and the latest sunrise is 3 hours, 3 minutes later at 8:06 AM on December 31. Based on the tourism score, the best time of year to visit Guernsey Airport for warm-weather activities is from late June to mid September. WeatherTAB Guernsey Help °C °F. During the summer months, the weather is not only sunny, with average daytime temperatures of anywhere between 20°C / 68°F and 25°C / … For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations. This section reports on the wide-area average surface temperature of that water. The chance of a wet day peaks at 41% on December 30. The figure below presents a compact representation of key lunar data for 2021. The thin dotted lines are the corresponding average perceived temperatures. 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. Guernsey has gone into lockdown following the discovery of four new cases of coronavirus, the island’s government has said. The Met Office said the UK’s “year of extremes” was on course to be the third or fourth warmest year on record, and … MERRA-2 Modern-Era Retrospective Analysis. Weather data is prone to errors, outages, and other defects. To characterize how pleasant the weather is at Guernsey Airport throughout the year, we compute two travel scores. The calmer time of year lasts for 6.3 months, from March 30 to October 6. On December 27, the cloudiest day of the year, the sky is overcast or mostly cloudy 67% of the time, and clear, mostly clear, or partly cloudy 33% of the time. 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. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 40% on December 6. The average temperature ranges from 6 … The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. 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. Daylight saving time (DST) is observed at Guernsey Airport during 2021, starting in the spring on March 28, lasting 7.1 months, and ending in the fall on October 31. The stations contributing to this reconstruction are: Guernsey Airport (82%, 5.6 kilometers, southwest); Jersey Airport (12%, 37 kilometers, southeast); Cherbourg – Maupertus Airport (4.0%, 80 kilometers, east); and Portland / Rnas (2.1%, 123 kilometers, north). The number of hours during which the Sun is visible (black line). Within 10 miles also contains only modest variations in elevation (413 feet). Click on each chart for more information. Based on the tourism score, the best time of year to visit Guernsey Airport for warm-weather activities is from late June to mid September. The Köppen-Geiger climate classification is Cfb. This section reports on the wide-area average surface temperature of that water. The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds. The windiest day of the year is January 1, with an average hourly wind speed of 20.8 miles per hour. The time of year with warmer water lasts for 3.3 months, from July 14 to October 23, with an average temperature above 59°F. 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 time of year with warmer water lasts for 3.3 months, from July 13 to October 23, with an average temperature above 59°F. Over the course of the year, the temperature typically varies from 19°F to 90°F and is rarely below 2°F or above 98°F. 77 likes. Throughout the year, the water temperature in Bailiwick of Guernsey does not rise above 20°C/68°F and therefore is … The length of the day in Saint Peter Port varies extremely over the course of the year. 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. Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. 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. Long Beach, Washington, United States (4,953 miles away); Scottsdale, Australia (10,901 miles); and Upper Hutt, New Zealand (11,865 miles) are the far-away foreign places with temperatures most similar to Guernsey Airport (view comparison). The cloudier part of the year begins around October 12 and lasts for 5.6 months, ending around March 31. Day by day forecast. Here are the average temperatures. Guernsey. Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter. Toggle navigation. The warm season lasts for 3.0 months, from June 20 to September 22, with an average daily high temperature above 64°F. The average annual temperature in Guernsey is 9.0 °C | 48.2 °F. 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. 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. The shaded overlays indicate night and civil twilight. The day least likely to be in the growing season is January 16, with a 58% chance. The calmest day of the year is August 5, with an average hourly wind speed of 11.7 miles per hour. The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands. The predominant average hourly wind direction at Guernsey Airport is from the west throughout the year. The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year. In Saint Peter Port, the summers are comfortable and windy; the winters are long, cold, wet, and extremely windy; and it is partly cloudy year round. Current weather in Guernsey, with temperatures in 2 cities, including high and low temperatures for the country. Every year, the island of Guernsey enjoys up to 2,000 hours of sunny weather, with the hottest months being from May to October. The percentage of time spent at various humidity comfort levels, categorized by dew point. You can therefore choose the period that goes from April to October. The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands. The brightest day of the year is June 24, with an average of 6.8 kWh. Guernsey - Average temperatures. August is a slightly cold and rainy time for sunbathing in Guernsey.August is a little too cold to enjoy swimming in Guernsey for any length of time. Based on growing degree days alone, the first spring blooms at Guernsey Airport should appear around May 4, only rarely appearing before April 16 or after May 24. The day of the year with the warmest water is August 27, with an average temperature of 62°F. The Guernsey climate is amongst the mildest and sunniest in the whole of the British Isles, being warmed by the adjacent Gulf Stream. These times of year are fairly slow with tourists. July is the hottest month for Guernsey County with an average high temperature of 84.0°, which ranks it as about average compared to other places in Ohio. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The figure below presents a compact representation of key lunar data for 2021. The earliest sunrise is at 5:03 AM on June 16, and the latest sunrise is 3 hours, 3 minutes later at 8:06 AM on December 31. In 2021, the shortest day is December 21, with 8 hours, 10 minutes of daylight; the longest day is June 21, with 16 hours, 17 minutes of daylight. The percentage of time spent at various humidity comfort levels, categorized by dew point. The day of the year with the coolest water is March 7, with an average temperature of 48°F. Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory. Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter. The brighter period of the year lasts for 3.3 months, from May 6 to August 16, with an average daily incident shortwave energy per square meter above 5.6 kWh. The warm season lasts for 3.0 months, from June 20 to September 21, with an average daily high temperature above 64°F. The area within 2 miles of Guernsey Airport is covered by water (37%), grassland (27%), and trees (25%), within 10 miles by water (96%), and within 50 miles by water (94%). Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database . The darker period of the year lasts for 3.8 months, from October 26 to February 20, with an average daily incident shortwave energy per square meter below 2.0 kWh. The clearer part of the year at Guernsey Airport begins around March 31 and lasts for 6.4 months, ending around October 12. 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 . Over the course of the year, the temperature typically varies from 42°F to 68°F and is rarely below 35°F or above 74°F. Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations. 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 (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere). Based on this score, the best time of year to visit Guernsey Airport for hot-weather activities is from mid July to mid August, with a peak score in the first week of August. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The wetter season lasts 5.4 months, from October 1 to March 13, with a greater than 29% chance of a given day being a wet day. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required. The average temperature ranges from 6,5 °C (43.5 °F) in February to 17 °C (62.5 °F) in August. The average hourly temperature, color coded into bands. 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. The sunniest place in the UK, Guernsey's climate is temperate and boasts some of the most glorious sunrises and sunsets all year round that are not to be missed. Within 10 miles also contains only modest variations in elevation (410 feet). The cool season lasts for 4.0 months, from November 30 to April 1, with an average daily high temperature below 52°F. 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. Guernsey Weather Forecasts. We assume no responsibility for any decisions made on the basis of the content presented on this site. 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