Average Weather in August in Prudhoe Bay Alaska, United States
Daily high temperatures decrease by 9°F, from 53°F to 44°F, rarely falling below 35°F or exceeding 67°F.
Daily low temperatures decrease by 6°F, from 40°F to 35°F, rarely falling below 29°F or exceeding 49°F.
For reference, on July 27, the hottest day of the year, temperatures in Prudhoe Bay typically range from 41°F to 54°F, while on February 9, the coldest day of the year, they range from -21°F to -9°F.
Average High and Low Temperature in August
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on August. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature in August
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The month of August in Prudhoe Bay experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 73% throughout the month. The highest chance of overcast or mostly cloudy conditions is 75% on August 29.
The clearest day of the month is August 2, with clear, mostly clear, or partly cloudy conditions 28% of the time.
For reference, on January 21, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 90%, while on June 26, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 35%.
Cloud Cover Categories in August
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Prudhoe Bay, the chance of a wet day over the course of August is essentially constant, remaining around 21% throughout.
For reference, the year's highest daily chance of a wet day is 22% on August 16, and its lowest chance is 2% on March 31.
Over the course of August in Prudhoe Bay, the chance of a day with only rain decreases from 21% to 17%, the chance of a day with mixed snow and rain remains an essentially constant 0% throughout, and the chance of a day with only snow remains an essentially constant 1% throughout.
Probability of Precipitation in August
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during August in Prudhoe Bay is essentially constant, remaining about 1.1 inches throughout, and rarely exceeding 2.1 inches or falling below 0.2 inches.
The highest average 31-day accumulation is 1.2 inches on August 9.
Average Monthly Rainfall in August
Due to its extreme latitude, Prudhoe Bay experiences polar day (also known as the midnight Sun) during the summer and polar night during the winter. These are periods of time in which the sun is continuously above or below the horizon for more than one day. The precise start and end dates of polar day and night vary from year to year and depend on the precise location and elevation of the observer, and the local topography.
Neither polar day nor polar night occur during the month of August.
Over the course of August in Prudhoe Bay, the length of the day is very rapidly decreasing. From the start to the end of the month, the length of the day decreases by 5 hours, 42 minutes, implying an average daily decrease of 11 minutes, 25 seconds, and weekly decrease of 1 hour, 19 minutes, 55 seconds.
The shortest day of the month is August 31, with 15 hours, 32 minutes of daylight and the longest day is August 1, with 21 hours, 14 minutes of daylight.
Hours of Daylight and Twilight in August
The earliest sunrise of the month in Prudhoe Bay is 3:18 AM on August 1 and the latest sunrise is 2 hours, 47 minutes later at 6:06 AM on August 31.
The latest sunset is 12:32 AM on August 1 and the earliest sunset is 2 hours, 55 minutes earlier at 9:37 PM on August 31.
Daylight saving time is observed in Prudhoe Bay during 2020, but it neither starts nor ends during August, so the entire month is in daylight saving time.
Sunrise & Sunset with Twilight in 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. Lower dew points feel drier and higher dew points feel more humid. 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 chance that a given day will be muggy in Prudhoe Bay is essentially constant during August, remaining around 0% throughout.
Humidity Comfort Levels in August
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. 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.
The average hourly wind speed in Prudhoe Bay is gradually increasing during August, increasing from 9.5 miles per hour to 10.2 miles per hour over the course of the month.
For reference, on January 12, the windiest day of the year, the daily average wind speed is 12.9 miles per hour, while on July 28, the calmest day of the year, the daily average wind speed is 9.3 miles per hour.
Average Wind Speed in August
The hourly average wind direction in Prudhoe Bay throughout August is predominantly from the east, with a peak proportion of 43% on August 31.
Wind Direction in August
Prudhoe Bay is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in Prudhoe Bay is essentially constant during August, remaining around 36°F throughout.
The highest average surface water temperature during August is 36°F on August 16.
Average Water Temperature in August
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).
The growing season in Prudhoe Bay typically lasts for 1.7 months (51 days), from around June 27 to around August 17, rarely starting before June 6, or ending after September 7.
During August in Prudhoe Bay, the chance that a given day is within the growing season is very rapidly decreasing falling from 78% to 19% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in August
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
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. In this report, we use a base of 50°F and a cap of 86°F.
The average accumulated growing degree days in Prudhoe Bay are essentially constant during August, remaining within 16°F of 92°F throughout.
Growing Degree Days in August
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. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy in Prudhoe Bay is rapidly decreasing during August, falling by 1.6 kWh, from 3.9 kWh to 2.4 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in August
For the purposes of this report, the geographical coordinates of Prudhoe Bay are 70.255 deg latitude, -148.337 deg longitude, and 46 ft elevation.
The topography within 2 miles of Prudhoe Bay is essentially flat, with a maximum elevation change of 59 feet and an average elevation above sea level of 39 feet. Within 10 miles is also essentially flat (82 feet). Within 50 miles is essentially flat (965 feet).
The area within 2 miles of Prudhoe Bay is covered by sparse vegetation (56%), herbaceous vegetation (21%), and water (13%), within 10 miles by sparse vegetation (31%) and water (28%), and within 50 miles by water (45%) and grassland (33%).
This report illustrates the typical weather in Prudhoe Bay year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Prudhoe Bay.
For each station, the records are corrected for the elevation difference between that station and Prudhoe Bay according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Prudhoe Bay is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Prudhoe Bay and a given station.
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 . 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.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for airports and weather stations are provided by AskGeo.com .
Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.
The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.
We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. 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.
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.