Average Weather in September in Bir el Ater Algeria
Daily high temperatures decrease by 10°F, from 88°F to 78°F, rarely falling below 70°F or exceeding 95°F.
Daily low temperatures decrease by 7°F, from 67°F to 60°F, rarely falling below 54°F or exceeding 72°F.
For reference, on July 18, the hottest day of the year, temperatures in Bir el Ater typically range from 69°F to 94°F, while on January 12, the coldest day of the year, they range from 36°F to 52°F.
Average High and Low Temperature in September
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on September. 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 September
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).
The month of September in Bir el Ater experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 15% to 35%.
The clearest day of the month is September 1, with clear, mostly clear, or partly cloudy conditions 85% of the time.
For reference, on October 22, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 40%, while on July 25, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 96%.
Cloud Cover Categories in September
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 Bir el Ater, the chance of a wet day over the course of September is gradually increasing, starting the month at 10% and ending it at 13%.
For reference, the year's highest daily chance of a wet day is 15% on September 16, and its lowest chance is 3% on July 16.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Bir el Ater is essentially constant, remaining about 0.6 inches throughout, and rarely exceeding 1.4 inches or falling below 0.1 inches.
The highest average 31-day accumulation is 0.7 inches on September 24.
Average Monthly Rainfall in September
Over the course of September in Bir el Ater, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 2 minutes, implying an average daily decrease of 2 minutes, 8 seconds, and weekly decrease of 14 minutes, 59 seconds.
The shortest day of the month is September 30, with 11 hours, 52 minutes of daylight and the longest day is September 1, with 12 hours, 54 minutes of daylight.
Hours of Daylight and Twilight in September
The earliest sunrise of the month in Bir el Ater is 6:00 AM on September 1 and the latest sunrise is 21 minutes later at 6:21 AM on September 30.
The latest sunset is 6:54 PM on September 1 and the earliest sunset is 41 minutes earlier at 6:13 PM on September 30.
Daylight saving time is not observed in Bir el Ater during 2018.
For reference, on June 21, the longest day of the year, the Sun rises at 5:14 AM and sets 14 hours, 29 minutes later, at 7:44 PM, while on December 21, the shortest day of the year, it rises at 7:31 AM and sets 9 hours, 49 minutes later, at 5:20 PM.
Sunrise & Sunset with Twilight in September
The chance that a given day will be muggy in Bir el Ater is essentially constant during September, remaining around 0% throughout.
For reference, on August 25, the muggiest day of the year, there are muggy conditions 1% 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 September
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Bir el Ater is essentially constant during September, remaining within 0.1 miles per hour of 7.5 miles per hour throughout.
For reference, on April 12, the windiest day of the year, the daily average wind speed is 9.8 miles per hour, while on August 9, the calmest day of the year, the daily average wind speed is 7.2 miles per hour.
Average Wind Speed in September
Wind Direction in September
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.
The month of September in Bir el Ater is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in September
The average accumulated growing degree days in Bir el Ater are rapidly increasing during September, increasing by 661°F, from 3,577°F to 4,237°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Bir el Ater is decreasing during September, falling by 1.4 kWh, from 6.5 kWh to 5.1 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in September
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%).
This report illustrates the typical weather in Bir el Ater 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 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).
Time zones for aiports and weather stations are provided by AskGeo.com .