Long Island Home Inspection Toolbar. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 4% on April 10. When available, historical temperature and dew point measurements are taken directly from this weather station. Ascension Island, Saint Helena, Ascension and Tristan da Cunha - August weather averages including high and low temperatures, humidity, rainfall, snowfall, … coordinates: 8° 3.0' S 15° 38.0' W Ascension Wideawake (St Helena - Ascension and Tristan Da Cunha) weather. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The solar day over the course of the year 2020. The calmest day of the year is February 2, with an average hourly wind speed of 12.9 miles per hour. The percentage of time spent in various temperature bands. Ascension, Bolivia Current weather report, Ascension, Bolivia, Santa Cruz, Bolivia Hour by hour 10 Day Weather Forecast, Historical Weather, Weather Animated Map, holiday weather forecast and more. The average daily incident shortwave solar energy experiences some seasonal variation over the course of the year. The temperature at RAF Ascension Island varies so little throughout the year that it is not entirely meaningful to discuss hot and cold seasons. The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands. View point-based 7-day wind and wave forecasts in Ascension Island. In 2020, the shortest day is June 20, with 11 hours, 40 minutes of daylight; the longest day is December 21, with 12 hours, 35 minutes of daylight. However, the climate is not as hot as it might seems; indeed, the heat of the sun is outweighed by the sudden gusts of wind which blow over the island. Click on each chart for more information. Rain falls all year round with slightly more significant downpours in the period of January to April. 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. Lower dew points feel drier and higher dew points feel more humid. The clearer part of the year at RAF Ascension Island begins around May 18 and lasts for 3.6 months, ending around September 5. 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. The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands. There is also a news box so you can keep up on current. Based on the beach/pool score, the best time of year to visit RAF Ascension Island for hot-weather activities is from mid May to late August. We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. This is for your internet explorer or firefox. Today’s and tonight’s Ascension Island, Saint Helena, Ascension and Tristan da Cunha weather forecast, weather conditions and Doppler radar from The Weather Channel and Weather.com 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 area within 2 miles of RAF Ascension Island is covered by water (73%) and grassland (21%), within 10 miles by water (98%), and within 50 miles by water (100%). google_ad_slot = "1750214043"; Time zones for airports and weather stations are provided by AskGeo.com . Temperatures at RAF Ascension Island are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. The brighter period of the year lasts for 2.1 months, from January 14 to March 18, with an average daily incident shortwave energy per square meter above 6.7 kWh. The frequency ranges from 0% to 4%, with an average value of 1%. weather Ascension - Atlantic Islands - WeatherOnline. The shaded overlays indicate night and civil twilight. The time of year with warmer water lasts for 3.1 months, from February 22 to May 27, with an average temperature above 81°F. Seasonal, Weather. The warmest sea temperature in Ascension Island today is 25°C/77°F (in Georgetown), and the coldest water temperature is 25°C/77°F (Georgetown). 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. other name: Island of Ascension: country: Saint Helena, Ascension and Tristan da Cunha: Ascension: Altitude: ca. Sea waves, which are generated by winds, are natives of the surrounding area while the stormy waves, which originate from the Atlantic Ocean, are formed in remote zones 3’000 km far and managed to make the trip to the coasts of Ascension. 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. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. Find out more about our data sources. To characterize how pleasant the weather is at RAF Ascension Island throughout the year, we compute two travel scores. Up to 90 days of daily highs, lows, and precipitation chances. Please choose your location from the nearest places to : Suggested places. Current weather in Georgetown (Ascension Island) and forecast for today, tomorrow, and next 14 days helping us to finance a high quality free-of-charge precision weather service. The darker period of the year lasts for 3.5 months, from May 22 to September 6, with an average daily incident shortwave energy per square meter below 5.7 kWh. Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database . 345 a.s.l. Based on this score, the best time of year to visit RAF Ascension Island for hot-weather activities is from mid May to late August, with a peak score in the last week of June. Baláo, Ecuador (4,514 miles away) is the far-away foreign place with temperatures most similar to RAF Ascension Island (view comparison). On November 11, the cloudiest day of the year, the sky is overcast or mostly cloudy 60% of the time, and clear, mostly clear, or partly cloudy 40% of the time. The average water temperature experiences some seasonal variation over the course of the year. Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. This section reports on the wide-area average surface temperature of that water. The average hourly temperature, color coded into bands. 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 calmer time of year lasts for 3.6 months, from December 13 to March 31. The sliding 31-day quantity of rainfall at RAF Ascension Island does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout. The average hourly wind speed at RAF Ascension Island experiences significant seasonal variation over the course of the year. Search for a place, autocomplete also includes a 'Use my location' option and your recent locations Search. At sea level, the temperature can vary from 20°C to 31°C. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. ASCENSION ISLAND: There are some peculiar things about the weather here in Ascension. Choose any offshore point in Ascension Island to view an accurate marine weather forecast. Click "Accept and continue" to accept all cookies, or click below, to change your cookie settings. The climate at RAF Ascension Island is warm, muggy, extremely windy, and partly cloudy. Ascension Island Weather, free ascension island weather software downloads, Page 3. Here, the days are short and brief; the sun rises at 6h30 and sets at 18h00. The climate guide for Ascension Island, St Helena & Islands shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Within 10 miles contains very significant variations in elevation (2,776 feet). Showing: All Year January February March April May June July August September October November December Within 50 miles also contains large variations in elevation (2,776 feet). The hurricanes in the surroundings of the Falkland Islands can generate huge waves that will reach Ascension four to six days later. Based on water temperature observations over the past ten years, the warmest sea in Ascension Island in December was 26°C/79°F, and the coldest 24°C/75°F RAF Ascension Island does not experience significant seasonal variation in the frequency of wet days (i.e., those with greater than 0.04 inches of liquid or liquid-equivalent precipitation). 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. 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 0.04 inches of precipitation or more. Sea water temperature throughout Ascension Island warms above 20°C/68°F and it is enough for a comfortable bath. 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. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required. The blend of heat and humidity dissipates daylight and provides an excellent explanation for the "foggy" landscapes. The cloudier part of the year begins around September 5 and lasts for 8.4 months, ending around May 18. Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC. The November weather guide for Ascension Island, St Helena & Islands shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. During the winter season in the Northern Hemisphere, hurricanes or tropical depressions of the North-Atlantic Ocean produce gigantic waves that can easily voyage across the Equator and thus develop into the most spectacular rollers. Find a forecast. We assume no responsibility for any decisions made on the basis of the content presented on this site. 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 next minute the heavens open! The earliest sunset is at 6:45 PM on May 24, and the latest sunset is 39 minutes later at 7:24 PM on January 30. google_ad_width = 468; The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands. 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). meteoblue uses the Google ad network which potentially could deliver ads from any of the advertising companies that are listed here: Further information . A British Overseas Territory, like the Falklands, Ascension is an arid island where the temperature rarely dips below 20C. Average Weather at RAF Ascension Island St. Helena. Catching a cold when it's cold outside isn't how it works. //-->. Georgetown is the capital and chief settlement of Ascension Island, in the British Overseas Territory of Saint Helena, Ascension and Tristan da Cunha, situated on the west coast of the island.. The muggiest day of the year is March 20, with muggy conditions 100% of the time. Health. An excellent water temperature of 25°C (77°F) and only 3 rainfall days, with 11mm (0.4") of accumulated rainfall, makes August a prime for swimming and other water activities. Use my current location. Shortwave radiation includes visible light and ultraviolet radiation. The topography within 2 miles of RAF Ascension Island contains very significant variations in elevation, with a maximum elevation change of 1,138 feet and an average elevation above sea level of 259 feet. You can choose the units of measurement for displaying data - in Celsius or Fahrenheit The climate at RAF Ascension Island is warm, muggy, extremely windy, and partly cloudy. The surrounding temperature is 6°C less than that which prevails at sea level while the degree of humidity can easily reach the 100%. 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. Today's sea temperature in Ascension Island is 25.2 ° C (Statistics for 09 Dec 1981-2005 – mean: 25.0 max: 25.7 min: 24.4 ° C) Summary some clouds This report illustrates the typical weather at RAF Ascension Island, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Over the course of the year, the temperature typically varies from 72°F to 86°F and is rarely below 70°F or above 88°F. 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