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Average Weather in Bir el Ater Algeria

In Bir el Ater, the summers are hot and clear; the winters are long, cold, and mostly clear; and it is dry year round. Over the course of the year, the temperature typically varies from 36°F to 94°F and is rarely below 31°F or above 101°F.

Based on the beach/pool score, the best time of year to visit Bir el Ater for hot-weather activities is from mid June to early September.

Climate Summary

coldcoolwarmhotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDec96%96%60%60%clearovercastprecipitation: 0.9 inprecipitation: 0.9 in0.2 in0.2 inmuggy: 1%muggy: 1%0%0%drydrybeach/pool score: 9.0beach/pool score: 9.00.00.0
Click on each chart for more information.

Temperature

The hot season lasts for 3.0 months, from June 10 to September 10, with an average daily high temperature above 85°F. The hottest day of the year is July 18, with an average high of 94°F and low of 69°F.

The cool season lasts for 3.8 months, from November 19 to March 11, with an average daily high temperature below 60°F. The coldest day of the year is January 12, with an average low of 36°F and high of 52°F.

Average High and Low Temperature

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 entire year of hourly average temperatures. 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.

Average Hourly Temperature

Average Hourly Temperature in Bir el AterJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMvery coldcoldcoldcoolcoolcomfortablewarmhotvery coldwarmvery coldvery cold
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.

Good Hope, Alabama, United States (5,178 miles away); Charlotte, North Carolina, United States (4,844 miles); and Yangzhong, China (6,268 miles) are the far-away foreign places with temperatures most similar to Bir el Ater (view comparison).

Clouds

In Bir el Ater, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Bir el Ater begins around June 14 and lasts for 2.8 months, ending around September 9. On July 25, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 96% of the time, and overcast or mostly cloudy 4% of the time.

The cloudier part of the year begins around September 9 and lasts for 9.2 months, ending around June 14. On October 22, the cloudiest day of the year, the sky is overcast or mostly cloudy 40% of the time, and clear, mostly clear, or partly cloudy 60% of the time.

Cloud Cover Categories

Cloud Cover Categories in Bir el AterclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2596%Jul 2596%Oct 2260%Oct 2260%Jun 1478%Jun 1478%Sep 978%Sep 978%clearmostly clearmostly cloudyovercastpartly cloudy
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. The chance of wet days in Bir el Ater varies throughout the year.

The wetter season lasts 9.8 months, from August 20 to June 12, with a greater than 9% chance of a given day being a wet day. The chance of a wet day peaks at 15% on September 16.

The drier season lasts 2.2 months, from June 12 to August 20. The smallest chance of a wet day is 3% on July 12.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 15% on September 16.

Daily Chance of Precipitation

Daily Chance of Precipitation in Bir el AterwetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Sep 1615%Sep 1615%Jul 123%Jul 123%Jan 19%Jan 19%rain
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 months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Bir el Ater experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.6 months, from August 28 to June 15, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around May 5, with an average total accumulation of 0.9 inches.

The rainless period of the year lasts for 2.4 months, from June 15 to August 28. The least rain falls around July 13, with an average total accumulation of 0.2 inches.

Average Monthly Rainfall

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

The length of the day in Bir el Ater varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 49 minutes of daylight; the longest day is June 21, with 14 hours, 29 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in Bir el AterJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 8 minMar 2012 hr, 8 minMar 2014 hr, 29 minJun 2114 hr, 29 minJun 2112 hr, 9 minSep 2312 hr, 9 minSep 239 hr, 49 minDec 219 hr, 49 minDec 21nightnightday
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 is at 5:13 AM on June 13, and the latest sunrise is 2 hours, 22 minutes later at 7:35 AM on January 7. The earliest sunset is at 5:16 PM on December 5, and the latest sunset is 2 hours, 29 minutes later at 7:45 PM on June 29.

Daylight saving time (DST) is not observed in Bir el Ater during 2018.

Sunrise & Sunset with Twilight

Sunrise & Sunset with Twilight in Bir el AterJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 135:13 AMJun 135:13 AM7:45 PMJun 297:45 PMJun 29Dec 55:16 PMDec 55:16 PM7:35 AMJan 77:35 AMJan 7daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2018. 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.

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 perceived humidity level in Bir el Ater, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

Humidity Comfort Levels

Humidity Comfort Levels in Bir el AterJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Mar 260%Mar 260%Aug 251%Aug 251%comfortablecomfortabledrydryhumidhumid
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 Bir el Ater experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.5 months, from December 6 to June 23, with average wind speeds of more than 8.5 miles per hour. The windiest day of the year is April 12, with an average hourly wind speed of 9.8 miles per hour.

The calmer time of year lasts for 5.5 months, from June 23 to December 6. The calmest day of the year is August 9, with an average hourly wind speed of 7.2 miles per hour.

Average Wind Speed

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

The predominant average hourly wind direction in Bir el Ater varies throughout the year.

The wind is most often from the east for 5.3 months, from April 26 to October 5, with a peak percentage of 42% on July 6. The wind is most often from the north for 5.0 days, from October 5 to October 10 and for 4.6 months, from December 7 to April 26, with a peak percentage of 28% on October 9. The wind is most often from the west for 1.9 months, from October 10 to December 7, with a peak percentage of 40% on December 4.

Wind Direction

Wind Direction in Bir el AterNEWNJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%westeastnorthsouth
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).

Best Time of Year to Visit

To characterize how pleasant the weather is in Bir el Ater throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit Bir el Ater for general outdoor tourist activities are from late April to late June and from late August to late October, with a peak score in the third week of September.

Tourism Score

Tourism Score in Bir el Aterbest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec02468107.77.71.01.07.67.66.36.3 precipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Bir el Ater for hot-weather activities is from mid June to early September, with a peak score in the last week of July.

Beach/Pool Score

Beach/Pool Score in Bir el Aterbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468109.09.00.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

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. 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.

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.

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.

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.

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.

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).

The growing season in Bir el Ater typically lasts for 10 months (304 days), from around February 13 to around December 14, rarely starting after March 17, or ending before November 21.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Bir el Atergrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Feb 1350%Feb 1350%Dec 1450%Dec 1490%Mar 1790%Mar 1790%Nov 2190%Nov 2112%Jan 1012%Jan 10Jul 23100%Jul 23100%very coldcoldcoolcomfortablewarmhotfreezing
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.

Based on growing degree days alone, the first spring blooms in Bir el Ater should appear around March 5, only rarely appearing before February 18 or after March 22.

Growing Degree Days

The average growing degree days accumulated over the course of the year, 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 experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.8 months, from April 27 to August 20, with an average daily incident shortwave energy per square meter above 7.0 kWh. The brightest day of the year is July 11, with an average of 8.0 kWh.

The darker period of the year lasts for 3.3 months, from October 31 to February 7, with an average daily incident shortwave energy per square meter below 3.9 kWh. The darkest day of the year is December 17, with an average of 2.9 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in Bir el AterbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWhJul 118.0 kWhJul 118.0 kWhDec 172.9 kWhDec 172.9 kWhApr 277.0 kWhApr 277.0 kWhOct 313.9 kWhOct 313.9 kWhFeb 73.9 kWhFeb 73.9 kWh
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 Bir el Ater are 34.745 deg latitude, 8.060 deg longitude, and 2,818 ft elevation.

The topography within 2 miles of Bir el Ater contains significant variations in elevation, with a maximum elevation change of 564 feet and an average elevation above sea level of 2,893 feet. Within 10 miles contains significant variations in elevation (2,385 feet). Within 50 miles contains large variations in elevation (5,843 feet).

The area within 2 miles of Bir el Ater is covered by sparse vegetation (43%), bare soil (35%), and artificial surfaces (22%), within 10 miles by sparse vegetation (79%) and bare soil (19%), and within 50 miles by bare soil (45%) and sparse vegetation (27%).

Data Sources

This report illustrates the typical weather in Bir el Ater, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Bir el Ater.

For each station, the records are corrected for the elevation difference between that station and Bir el Ater 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 Bir el Ater is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Bir el Ater and a given station.

The stations contributing to this reconstruction are: Tebessa (44%, 77 kilometers, north); Gafsa – Ksar International Airport (32%, 79 kilometers, southeast); and Tozeur–Nefta International Airport (23%, 90 kilometers, south).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , 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 aiports 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.