Bir el Ater climate — normals and trends
Bir el Ater (Algeria) has a cold desert climate (BWk) under the Köppen-Geiger classification. Its mean annual temperature is 16.3 °C and it receives 211 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (27.7 °C on average) and the coldest is January (6.1 °C). Rainfall peaks in March.
Bir el Ater averages 15 frost days, 84 hot days (≥ 30 °C) and 43 rainy days per year.
Bir el Ater has warmed by +2.9 °C between 1940 and 2025, or +0.34 °C per decade. This trend is statistically significant.
The number of frost days there went from about 28 to 2 per year over the period.
The hottest day of the period reached 41.8 °C (on 23 July 2010) and the coldest -7.3 °C (on 16 January 1960).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
Bir el AterTébessa Province
- coords
- 34.74°, 8.06°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.3°C
Average daily high
21.5°C
Average daily low
11.1°C
Annual rainfall
211mm
Sunshine / day
10.7h
Mean relative humidity
56%
Average peak wind
18.9km/h
Seasonal range
21.6°C
Frost days (< 0 °C)
15 d/yr
Hot days (≥ 30 °C)
84 d/yr
Rainy days (≥ 1 mm)
43 d/yr
Annual snowfall
2.4 cm
Average feels-like high
19.3 °C
Average feels-like low
8.7 °C
Average peak gust
37.7 km/h
Tropical nights (≥ 20 °C)
57 d/yr
Solar radiation
19.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.9 °C
since 1940
+0.3 °C per decade · r² = 0.74 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
41.8 °C
23 July 2010
Coldest day
-7.3 °C
16 January 1960
Wettest day
52 mm
4 October 1957
Windiest day
52.7 km/h
20 January 2005
Strongest gust
112.0 km/h
26 March 1963
Hottest feels-like
41.4 °C
10 July 2023
Coldest feels-like
-12.3 °C
16 January 1960
Snowiest day
10.9 cm
11 January 2003
Sunniest day
13.4 h
3 July 1943
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 12.8 °C | +2.1 °C | 15 mm | -1 mm |
| Feb | 13.3 °C | +0.9 °C | 45 mm | +29 mm |
| Mar | 18.4 °C | +2.6 °C | 12 mm | -14 mm |
| Apr | 20.6 °C | +0.9 °C | 55 mm | +31 mm |
| May | 26.4 °C | +1.3 °C | 17 mm | -2 mm |
| Jun | 33.1 °C | +2.6 °C | 5 mm | -5 mm |
| Jul | 34.7 °C | +1.1 °C | 10 mm | +4 mm |
| Aug | 33.4 °C | +0.7 °C | 5 mm | -3 mm |
| Sep | 29.4 °C | +1.6 °C | 17 mm | -6 mm |
| Oct | 23.3 °C | +1.4 °C | 15 mm | -11 mm |
| Nov | 16.7 °C | +0.8 °C | 4 mm | -15 mm |
| Dec | 12.4 °C | +0.8 °C | 43 mm | +25 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Bir el Ater?
Bir el Ater has a cold desert climate (Köppen BWk). Over 1940-2025, the average annual temperature is 16.3 °C and it receives 211 mm of precipitation per year.
What is the hottest day ever recorded in Bir el Ater?
The hottest day measured in Bir el Ater between 1940 and 2025 was 23 July 2010, reaching 41.8 °C.
What is the coldest day in Bir el Ater?
The coldest day measured in Bir el Ater between 1940 and 2025 was 16 January 1960, at -7.3 °C.
Does it snow in Bir el Ater?
Yes. Bir el Ater gets on average 2.4 cm of snow per year and has around 15 frost days.
Has the climate of Bir el Ater warmed?
Yes: Bir el Ater warmed by +2.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bir el Ater?
The wettest day measured in Bir el Ater between 1940 and 2025 was 4 October 1957, with 52 mm of rain in 24 hours.
What was the windiest day in Bir el Ater?
The windiest day measured in Bir el Ater between 1940 and 2025 was 20 January 2005, with winds reaching 52.7 km/h.
What is the warmest month in Bir el Ater?
The warmest month in Bir el Ater is July (27.7 °C on average); the coldest is January (6.1 °C).
How much does it rain in Bir el Ater?
Bir el Ater receives on average 211 mm of precipitation per year, spread over about 43 rainy days.
Is it sunny in Bir el Ater?
Bir el Ater gets on average 10.7 hours of sunshine per day, roughly 3,905 hours per year over 1940-2025.
What is the biggest single-day snowfall in Bir el Ater?
The heaviest 24-hour snowfall measured in Bir el Ater between 1940 and 2025 was 11 January 2003, with 10.9 cm.
Are there tropical nights in Bir el Ater?
Yes: Bir el Ater has on average 57 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Bir el Ater?
In Bir el Ater, between 1940 and 2025, the highest apparent temperature reached 41.4 °C on 10 July 2023, and the lowest was -12.3 °C on 16 January 1960.
Compare Bir el Ater with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bir el Ater