Aïn Bessem climate — normals and trends
Aïn Bessem (Algeria) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 15.0 °C and it receives 529 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 (25.4 °C on average) and the coldest is January (6.3 °C). Rainfall peaks in April.
Aïn Bessem averages 17 frost days, 72 hot days (≥ 30 °C) and 95 rainy days per year.
Aïn Bessem 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 6 per year over the period.
The hottest day of the period reached 42.7 °C (on 23 July 2023) and the coldest -10.5 °C (on 4 January 1945).
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
Aïn BessemBouira Province
- coords
- 36.29°, 3.67°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.0°C
Average daily high
20.9°C
Average daily low
9.8°C
Annual rainfall
529mm
Sunshine / day
10.5h
Mean relative humidity
67%
Average peak wind
13.8km/h
Seasonal range
19.1°C
Frost days (< 0 °C)
17 d/yr
Hot days (≥ 30 °C)
72 d/yr
Rainy days (≥ 1 mm)
95 d/yr
Annual snowfall
12.1 cm
Average feels-like high
19.9 °C
Average feels-like low
8.2 °C
Average peak gust
37.1 km/h
Tropical nights (≥ 20 °C)
27 d/yr
Solar radiation
18.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.9 °C
since 1940
+0.3 °C per decade · r² = 0.63 · 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
42.7 °C
23 July 2023
Coldest day
-10.5 °C
4 January 1945
Wettest day
67 mm
5 October 1957
Windiest day
37.8 km/h
8 February 1996
Strongest gust
103.3 km/h
30 December 2000
Hottest feels-like
42.7 °C
10 July 2023
Coldest feels-like
-15.5 °C
4 January 1945
Snowiest day
15.1 cm
16 December 1960
Sunniest day
14.0 h
21 June 1940
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 | 13.0 °C | +2.0 °C | 79 mm | +21 mm |
| Feb | 15.0 °C | +2.6 °C | 21 mm | -32 mm |
| Mar | 16.9 °C | +1.6 °C | 46 mm | -18 mm |
| Apr | 20.8 °C | +2.4 °C | 69 mm | +0 mm |
| May | 24.1 °C | +1.2 °C | 75 mm | +24 mm |
| Jun | 33.3 °C | +5.0 °C | 9 mm | -15 mm |
| Jul | 34.1 °C | +1.5 °C | 12 mm | +4 mm |
| Aug | 33.9 °C | +1.4 °C | 6 mm | -9 mm |
| Sep | 29.8 °C | +1.9 °C | 59 mm | +21 mm |
| Oct | 24.3 °C | +2.3 °C | 35 mm | -12 mm |
| Nov | 16.9 °C | +1.1 °C | 43 mm | -6 mm |
| Dec | 13.1 °C | +1.3 °C | 53 mm | -4 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 Aïn Bessem?
Aïn Bessem has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 15.0 °C and it receives 529 mm of precipitation per year.
What is the hottest day ever recorded in Aïn Bessem?
The hottest day measured in Aïn Bessem between 1940 and 2025 was 23 July 2023, reaching 42.7 °C.
What is the coldest day in Aïn Bessem?
The coldest day measured in Aïn Bessem between 1940 and 2025 was 4 January 1945, at -10.5 °C.
Does it snow in Aïn Bessem?
Yes. Aïn Bessem gets on average 12.1 cm of snow per year and has around 17 frost days.
Has the climate of Aïn Bessem warmed?
Yes: Aïn Bessem warmed by +2.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Aïn Bessem?
The wettest day measured in Aïn Bessem between 1940 and 2025 was 5 October 1957, with 67 mm of rain in 24 hours.
What was the windiest day in Aïn Bessem?
The windiest day measured in Aïn Bessem between 1940 and 2025 was 8 February 1996, with winds reaching 37.8 km/h.
What is the warmest month in Aïn Bessem?
The warmest month in Aïn Bessem is July (25.4 °C on average); the coldest is January (6.3 °C).
How much does it rain in Aïn Bessem?
Aïn Bessem receives on average 529 mm of precipitation per year, spread over about 95 rainy days.
Is it sunny in Aïn Bessem?
Aïn Bessem gets on average 10.5 hours of sunshine per day, roughly 3,833 hours per year over 1940-2025.
What is the biggest single-day snowfall in Aïn Bessem?
The heaviest 24-hour snowfall measured in Aïn Bessem between 1940 and 2025 was 16 December 1960, with 15.1 cm.
Are there tropical nights in Aïn Bessem?
Yes: Aïn Bessem has on average 27 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Aïn Bessem?
In Aïn Bessem, between 1940 and 2025, the highest apparent temperature reached 42.7 °C on 10 July 2023, and the lowest was -15.5 °C on 4 January 1945.
Compare Aïn Bessem with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Aïn Bessem