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Average Weather in August in Atar Mauritania

Daily high temperatures are around 105°F, rarely falling below 99°F or exceeding 111°F.

Daily low temperatures are around 86°F, rarely falling below 81°F or exceeding 90°F. The highest daily average low temperature is 86°F on August 20.

For reference, on July 4, the hottest day of the year, temperatures in Atar typically range from 86°F to 107°F, while on January 13, the coldest day of the year, they range from 59°F to 80°F.

Average High and Low Temperature in August

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

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

Average Hourly Temperature in August in Atar18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMJulSepNowNowhotswelteringwarmhotsweltering
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 average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Badr Ḩunayn, Saudi Arabia (3,311 miles away) is the far-away foreign place with temperatures most similar to Atar (view comparison).

Clouds

The month of August in Atar experiences rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 20% to 32%.

The clearest day of the month is August 1, with clear, mostly clear, or partly cloudy conditions 80% of the time.

For reference, on November 23, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 49%, while on June 30, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 89%.

Cloud Cover Categories in August

Cloud Cover Categories in August in Atar1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSepAug 180%Aug 180%Aug 3168%Aug 3168%Aug 1176%Aug 1176%Aug 2171%Aug 2171%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Atar, the chance of a wet day over the course of August is rapidly increasing, starting the month at 5% and ending it at 12%.

For reference, the year's highest daily chance of a wet day is 12% on August 30, and its lowest chance is 0% on April 1.

Probability of Precipitation in August

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).

Rainfall

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 Atar is gradually increasing, starting the month at 0.4 inches, when it rarely exceeds 1.1 inches, and ending the month at 0.8 inches, when it rarely exceeds 1.9 inches.

Average Monthly Rainfall in August

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 thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

Over the course of August in Atar, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 30 minutes, implying an average daily decrease of 1 minute, 1 second, and weekly decrease of 7 minutes, 6 seconds.

The shortest day of the month is August 31, with 12 hours, 33 minutes of daylight and the longest day is August 1, with 13 hours, 3 minutes of daylight.

Hours of Daylight and Twilight in August

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month in Atar is 6:26 AM on August 1 and the latest sunrise is 9 minutes later at 6:36 AM on August 31.

The latest sunset is 7:29 PM on August 1 and the earliest sunset is 21 minutes earlier at 7:08 PM on August 31.

Daylight saving time is not observed in Atar during 2021.

For reference, on June 21, the longest day of the year, the Sun rises at 6:12 AM and sets 13 hours, 23 minutes later, at 7:35 PM, while on December 21, the shortest day of the year, it rises at 7:23 AM and sets 10 hours, 53 minutes later, at 6:17 PM.

Sunrise & Sunset with Twilight in August

The solar day over the course of August. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Moon

The figure below presents a compact representation of key lunar data for August 2021. 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. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in August

Moon in Atar18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMJulSepJul 101:17 AMJul 101:17 AMJul 242:38 AMJul 242:38 AMAug 81:51 PMAug 81:51 PMAug 2212:03 PMAug 2212:03 PMSep 712:52 AMSep 712:52 AMSep 2011:55 PMSep 2011:55 PM6:29 AM6:29 AM8:18 PM8:18 PM7:24 PM7:24 PM6:34 AM6:34 AM6:14 AM6:14 AM7:46 PM7:46 PM6:56 PM6:56 PM6:23 AM6:23 AM5:57 AM5:57 AM7:04 PM7:04 PM6:52 PM6:52 PM7:00 AM7:00 AM
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 shaded overlays indicate night and civil twilight.

Humidity

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 Atar is increasing during August, rising from 5% to 11% over the course of the month.

The highest chance of a muggy day during August is 11% on August 27.

For reference, on August 27, the muggiest day of the year, there are muggy conditions 11% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in August

Humidity Comfort Levels in August in Atar1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%JulSepAug 2711%Aug 2711%Aug 15%Aug 15%Aug 117%Aug 117%muggymuggycomfortablecomfortabledrydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

Wind

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 Atar is gradually decreasing during August, decreasing from 10.5 miles per hour to 9.8 miles per hour over the course of the month.

For reference, on January 7, the windiest day of the year, the daily average wind speed is 12.1 miles per hour, while on October 24, the calmest day of the year, the daily average wind speed is 9.6 miles per hour.

Average Wind Speed in August

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction in Atar during August is predominantly out of the west from August 1 to August 13 and the north from August 13 to August 31.

Wind Direction in August

Wind Direction in August in AtarNWN1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%JulSepNowNowwesteastnorthsouth
northeastsouthwest
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 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Growing Season

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 in Atar are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Time Spent in Various Temperature Bands and the Growing Season in August

Time Spent in Various Temperature Bands and the Growing Season in August in Atar1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JulSep100%Aug 16100%Aug 16100%Jul 3100%Jul 3NowNowwarmhotsweltering
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 percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

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 Atar are very rapidly increasing during August, increasing by 1,073°F, from 6,242°F to 7,315°F, over the course of the month.

Growing Degree Days in August

Growing Degree Days in August in Atar1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031316,200°F6,200°F6,400°F6,400°F6,600°F6,600°F6,800°F6,800°F7,000°F7,000°F7,200°F7,200°F7,400°F7,400°FJulSepAug 16,242°FAug 16,242°FAug 317,315°FAug 317,315°FAug 116,599°FAug 116,599°FAug 216,959°FAug 216,959°FNowNow
The average growing degree days accumulated over the course of August, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 Atar is essentially constant during August, remaining within 0.2 kWh of 6.8 kWh throughout.

Average Daily Incident Shortwave Solar Energy in August

Average Daily Incident Shortwave Solar Energy in August in Atar1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhJulSepAug 16.9 kWhAug 16.9 kWhAug 316.6 kWhAug 316.6 kWhAug 116.8 kWhAug 116.8 kWhAug 216.7 kWhAug 216.7 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Atar are 20.518 deg latitude, -13.049 deg longitude, and 735 ft elevation.

The topography within 2 miles of Atar contains only modest variations in elevation, with a maximum elevation change of 105 feet and an average elevation above sea level of 747 feet. Within 10 miles contains only modest variations in elevation (1,985 feet). Within 50 miles also contains large variations in elevation (2,388 feet).

The area within 2 miles of Atar is covered by bare soil (100%), within 10 miles by bare soil (100%), and within 50 miles by bare soil (100%).

Data Sources

This report illustrates the typical weather in Atar, 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 is only a single weather station, Atar Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Atar.

At a distance of 1 kilometer from Atar, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

The station records are corrected for the elevation difference between the station and Atar according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

Other Data

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.

Disclaimer

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.