One minute the weather is as clear a bell. Please choose your location from the nearest places … Find out more about our data sources. Weather forecast up to 14 days including temperature, weather condition and precipitation and much more. 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). * NOTE: not all live weather reports for Ascension Island update at the same frequency which is why some locations can show data from stations that are more remote if … support@__remove_this_part__weatherspark.com. Therefore, it is important to maximize caution while swimming and to avoid beaches that are not sheltered by coral reefs. Choose any offshore point in Ascension Island to view an accurate marine weather forecast. The percentage of time spent at various humidity comfort levels, categorized by dew point. Click on each chart for more information. On July 22, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 84% of the time, and overcast or mostly cloudy 16% of the time. Weather news This site also uses cookies meteoblue depends on cookies for best online experience, to analyse site usage and personalise advertising and content, for which we need your consent. The windier part of the year lasts for 8.4 months, from March 31 to December 13, with average wind speeds of more than 14.6 miles per hour. Long Island Home Inspection Toolbar. It is in December, the hottest period of the year, that we can observe the arrival of turtles and the occurrence of the "swell" phenomenon which is aptly described as the breaking and collapsing of huge rollers on beaches in a thundering crash. 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. 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.. Within 10 miles contains very significant variations in elevation (2,776 feet). The calmest day of the year is February 2, with an average hourly wind speed of 12.9 miles per hour. Ascension Wideawake (St Helena - Ascension and Tristan Da Cunha) weather. coordinates: 8° 3.0' S 15° 38.0' W 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. RAF Ascension Island experiences extreme seasonal variation in the perceived humidity. The consistent weather, uncluttered airspace and flexible access to the runway make Ascension Island a valuable training environment.” The Ascension Island is one of Britain’s oldest and most remote possessions. Although the sea appears to be calm, the swell gives no warning before taking over the smooth waters. meteoblue uses the Google ad network which potentially could deliver ads from any of the advertising companies that are listed here: Further information . The average water temperature experiences some seasonal variation over the course of the year. View point-based 7-day wind and wave forecasts in Ascension Island. google_ad_height = 15; 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. WINTER 2020-21: A season of extremes across Canada. Please choose your location from the nearest places to : Suggested places. The calmer time of year lasts for 3.6 months, from December 13 to March 31. 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. 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 . 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. This toolbar has a weather checker to see when a good day is to schedule a home inspection. The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands. 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. August, the last month of the winter, in Ascension Island, is also a moderately hot month, with average temperature fluctuating between 28°C (82.4°F) and 22°C (71.6°F). We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year. google_ad_width = 468; Daylight saving time (DST) is not observed at RAF Ascension Island during 2020. Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory. 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. 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, … This is for your internet explorer or firefox. The hurricanes in the surroundings of the Falkland Islands can generate huge waves that will reach Ascension four to six days later. //-->. The thin dotted lines are the corresponding average perceived temperatures. Search for a place, autocomplete also includes a 'Use my location' option and your recent locations Search. other name: Island of Ascension: country: Saint Helena, Ascension and Tristan da Cunha: Ascension: Altitude: ca. 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. helping us to finance a high quality free-of-charge precision weather service. Average Weather at RAF Ascension Island St. Helena. Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database . Average Weather on August 24 at RAF Ascension Island St. Helena. The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands. weather Ascension - Atlantic Islands - WeatherOnline. At sea level, the temperature can vary from 20°C to 31°C. The climate at RAF Ascension Island is warm, muggy, extremely windy, and partly cloudy. The blend of heat and humidity dissipates daylight and provides an excellent explanation for the "foggy" landscapes. Ascension (St Helena - Ascension and Tristan Da Cunha) weather. Based on this score, the best time of year to visit RAF Ascension Island for general outdoor tourist activities is from mid June to late September, with a peak score in the last week of July. 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 shaded overlays indicate night and civil twilight. Forever veiled by clouds, "Green Mountain" possesses a true microclimate. Ascension Island sea surface temperature in winter In December sea water temperature throughout Ascension Island warms above 20°C/68°F and it is enough for a comfortable bath. The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds. Ascension Island has a subtropical climate, experiencing warm weather all year round with an average humidity of 69 percent. From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night. Up to 90 days of daily highs, lows, and precipitation chances. 345 a.s.l. We assume no responsibility for any decisions made on the basis of the content presented on this site. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The average hourly wind speed at RAF Ascension Island experiences significant seasonal variation over the course of the year. 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 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. Georgetown, Ascension Island - Travel and vacation weather averages, current conditions and forecasts. Shortwave radiation includes visible light and ultraviolet radiation. Time zones for airports and weather stations are provided by AskGeo.com . The day of the year with the coolest water is September 18, with an average temperature of 75°F. You can choose the units of measurement for displaying data - in Celsius or Fahrenheit 22 October 2020 at 11:00-12:00: Fair, Temperature 22, 0 mm, Moderate breeze, 6 m/s from east 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. RAF Ascension Island has a weather station that reported reliably enough during the analysis period that we have included it in our network. Nature, Seasonal. The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. For the purposes of this report, the geographical coordinates of RAF Ascension Island are -7.970 deg latitude, -14.394 deg longitude, and 230 ft elevation. 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. The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. Weather data is prone to errors, outages, and other defects. google_ad_slot = "1750214043"; The clearer part of the year at RAF Ascension Island begins around May 18 and lasts for 3.6 months, ending around September 5. The average temperature reaches a maximum of 88ºF (31ºC) during the months of January, February and March and temperatures generally stay within the range of 71°F (22ºC) to 88°F (31ºC) all year round. Find a forecast. The day of the year with the warmest water is April 7, with an average temperature of 82°F. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required. The figure below presents a compact representation of key lunar data for 2020. The thin dotted line is the corresponding average liquid-equivalent snowfall. 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%. The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands. The time of year with cooler water lasts for 3.9 months, from August 6 to December 2, with an average temperature below 77°F. The average hourly temperature, color coded into bands. This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The figure below shows you a compact characterization of the entire year of hourly average temperatures. The windiest day of the year is August 14, with an average hourly wind speed of 16.3 miles per hour. Know what's coming with AccuWeather's extended daily forecasts for RAF Ascension Island, Ascension, Saint Helena. 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. Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations. 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. 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. 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 Catching a cold when it's cold outside isn't how it works. The percentage of time spent in various temperature bands. 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). At sea level, the temperature can vary from 20°C to 31°C. Ascension Island Weather, free ascension island weather software downloads, Page 3. 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. 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 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. 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. /* 468x15 hor ads contenu webmag */ The number of hours during which the Sun is visible (black line). The average daily incident shortwave solar energy experiences some seasonal variation over the course of the year. The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands. The surrounding temperature is 6°C less than that which prevails at sea level while the degree of humidity can easily reach the 100%. 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 shaded overlays indicate night and civil twilight. 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 satellite image shows nary a cloud near the island, the dew-point is low and all is well in the world. 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. 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. 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 earliest sunrise is at 6:27 AM on November 15, and the latest sunrise is 45 minutes later at 7:12 AM on July 15. Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The muggiest day of the year is March 20, with muggy conditions 100% of the time. 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. Use my current location. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. 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. MERRA-2 Modern-Era Retrospective Analysis. 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. In this report, we use a base of 50°F and a cap of 86°F. 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. There is also a news box so you can keep up on current. 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. 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. Search for a place, autocomplete also includes a 'Use my location' option and your recent locations Search. 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. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. Lower dew points feel drier and higher dew points feel more humid. The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. One of the causes of this slightly different weather pattern of an earlier winter but with a much nicer August could be that this is an El Niño year. Showing: All Year January February March April May June July August September October November December At RAF Ascension Island, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year. The solar day over the course of the year 2020. Find the most current and reliable 14 day weather forecasts, storm alerts, reports and information for Ascension, PE, CA with The Weather Network. Within 50 miles also contains large variations in elevation (2,776 feet). 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. 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 beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. 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%). ASCENSION ISLAND: There are some peculiar things about the weather here in Ascension. 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. 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 cloudier part of the year begins around September 5 and lasts for 8.4 months, ending around May 18. RAF Ascension Island is located near a large body of water (e.g., ocean, sea, or large lake). The predominant average hourly wind direction at RAF Ascension Island is from the east throughout the year. Rain falls all year round with slightly more significant downpours in the period of January to April. google_ad_client = "pub-6353727198433132"; Find out more about our data sources. 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). Travel in Ascension island, weather information. This particular occurrence always arouses the same question in our minds: how can we be having such heavy and swelling waves especially when the wind has not gained high speed? 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 next minute the heavens open! Sea water temperature throughout Ascension Island warms above 20°C/68°F and it is enough for a comfortable bath. 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 black line is the percentage chance that a given day is within the growing season. 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 brightest day of the year is February 13, with an average of 7.0 kWh. To better understand this phenomenon, we should distinguish between the sea waves and the swell waves. The climate at RAF Ascension Island is warm, muggy, extremely windy, and partly cloudy. Current weather in Georgetown (Ascension Island) and forecast for today, tomorrow, and next 14 days 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. Seasonal, Weather.