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 Ascension - Atlantic Islands - WeatherOnline. Time zones for airports and weather stations are provided by AskGeo.com . 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). Current weather in Georgetown (Ascension Island) and forecast for today, tomorrow, and next 14 days The windiest day of the year is August 14, with an average hourly wind speed of 16.3 miles per hour. 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. In this report, we use a base of 50°F and a cap of 86°F. 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. google_ad_slot = "1750214043"; 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. 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 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. Travel in Ascension island, weather information. 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. Find a forecast. The day of the year with the warmest water is April 7, with an average temperature of 82°F. coordinates: 8° 3.0' S 15° 38.0' W Find out more about our data sources. The climate at RAF Ascension Island is warm, muggy, extremely windy, and partly cloudy. Please choose your location from the nearest places … Weather forecast up to 14 days including temperature, weather condition and precipitation and much more. google_ad_width = 468; 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). 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. The cloudier part of the year begins around September 5 and lasts for 8.4 months, ending around May 18. Baláo, Ecuador (4,514 miles away) is the far-away foreign place with temperatures most similar to RAF Ascension Island (view comparison). 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. Rain falls all year round with slightly more significant downpours in the period of January to April. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required. Find the most current and reliable 14 day weather forecasts, storm alerts, reports and information for Ascension, PE, CA with The Weather Network. 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. . The number of hours during which the Sun is visible (black line). 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. Click on each chart for more information. 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. The muggiest day of the year is March 20, with muggy conditions 100% of the time. 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. 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. Choose any offshore point in Ascension Island to view an accurate marine weather forecast. 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 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. This toolbar has a weather checker to see when a good day is to schedule a home inspection. Lower dew points feel drier and higher dew points feel more humid. 12 November 2020 at 20:00-00:00: Partly cloudy, Temperature 24, 0 mm, Fresh breeze, 9 m/s from southeast 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 average hourly wind speed at RAF Ascension Island experiences significant seasonal variation over the course of the year. WINTER 2020-21: A season of extremes across Canada. You can choose the units of measurement for displaying data - in Celsius or Fahrenheit 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 day of the year with the coolest water is September 18, with an average temperature of 75°F. Average Weather at RAF Ascension Island St. Helena. 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? 345 a.s.l. The frequency ranges from 0% to 4%, with an average value of 1%. From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night. support@__remove_this_part__weatherspark.com. Ascension Wideawake (St Helena - Ascension and Tristan Da Cunha) 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). 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 time of year with cooler water lasts for 3.9 months, from August 6 to December 2, with an average temperature below 77°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. Ascension Island is a tiny dot of green in the tropical mid-Atlantic, a volcanic outpost of empire where it's hot and cold at the same time. 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 is for your internet explorer or firefox. Sea water temperature throughout Ascension Island warms above 20°C/68°F and it is enough for a comfortable bath. Average Weather on August 24 at RAF Ascension Island St. Helena. ASCENSION ISLAND: There are some peculiar things about the weather here in Ascension. Get the forecast for today, tonight & tomorrow's weather for RAF Ascension Island, Ascension, Saint Helena. 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. Showing: All Year January February March April May June July August September October November December 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. Search for a place, autocomplete also includes a 'Use my location' option and your recent locations Search. 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. Here, the days are short and brief; the sun rises at 6h30 and sets at 18h00. 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 average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands. RAF Ascension Island experiences extreme seasonal variation in the perceived humidity. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The figure below presents a compact representation of key lunar data for 2020. Ascension (St Helena - Ascension and Tristan Da Cunha) weather. 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 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. Weather data is prone to errors, outages, and other defects. 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. Use my current location. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. Find a forecast. Ascension Island has a subtropical climate, experiencing warm weather all year round with an average humidity of 69 percent. 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. 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 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. meteoblue uses the Google ad network which potentially could deliver ads from any of the advertising companies that are listed here: Further information . Health. The calmest day of the year is February 2, with an average hourly wind speed of 12.9 miles per hour. Know what's coming with AccuWeather's extended daily forecasts for RAF Ascension Island, Ascension, Saint Helena. Search for a place, autocomplete also includes a 'Use my location' option and your recent locations Search. The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands. The blend of heat and humidity dissipates daylight and provides an excellent explanation for the "foggy" landscapes. google_ad_client = "pub-6353727198433132"; The shaded overlays indicate night and civil twilight. 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. The shaded overlays indicate night and civil twilight. We assume no responsibility for any decisions made on the basis of the content presented on this site. Please choose your location from the nearest places to : Suggested places. Find out more about our data sources. The average daily incident shortwave solar energy experiences some seasonal variation over the course of the year. /* 468x15 hor ads contenu webmag */ The hurricanes in the surroundings of the Falkland Islands can generate huge waves that will reach Ascension four to six days later. 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 The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. 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. 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). 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 predominant average hourly wind direction at RAF Ascension Island is from the east throughout the year. 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. Click "Accept and continue" to accept all cookies, or click below, to change your cookie settings. Although the sea appears to be calm, the swell gives no warning before taking over the smooth waters. There is also a news box so you can keep up on current. Long Island Home Inspection Toolbar. 22 October 2020 at 11:00-12:00: Fair, Temperature 22, 0 mm, Moderate breeze, 6 m/s from east Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations. At sea level, the temperature can vary from 20°C to 31°C. The solar day over the course of the year 2020. 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. The satellite image shows nary a cloud near the island, the dew-point is low and all is well in the world. RAF Ascension Island is located near a large body of water (e.g., ocean, sea, or large lake). 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. The next minute the heavens open! * 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 … The average hourly temperature, color coded into bands. Daylight saving time (DST) is not observed at RAF Ascension Island during 2020. 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 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. Within 50 miles also contains large variations in elevation (2,776 feet). The brightest day of the year is February 13, with an average of 7.0 kWh. The percentage of time spent at various humidity comfort levels, categorized by dew point. 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. other name: Island of Ascension: country: Saint Helena, Ascension and Tristan da Cunha: Ascension: Altitude: ca. 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