’Aïn Deheb climate — normals and trends
’Aïn Deheb (Algeria) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 15.3 °C and it receives 240 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 (27.5 °C on average) and the coldest is January (5.2 °C). Rainfall peaks in April.
’Aïn Deheb averages 28 frost days, 91 hot days (≥ 30 °C) and 56 rainy days per year.
’Aïn Deheb has warmed by +2.6 °C between 1940 and 2025, or +0.31 °C per decade. This trend is statistically significant.
The number of frost days there went from about 40 to 16 per year over the period.
The hottest day of the period reached 41.4 °C (on 5 July 2021) and the coldest -12.8 °C (on 13 December 1967).
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 DehebTiaret Province
- coords
- 34.84°, 1.55°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.3°C
Average daily high
21.3°C
Average daily low
9.7°C
Annual rainfall
240mm
Sunshine / day
10.7h
Mean relative humidity
56%
Average peak wind
18.8km/h
Seasonal range
22.3°C
Frost days (< 0 °C)
28 d/yr
Hot days (≥ 30 °C)
91 d/yr
Rainy days (≥ 1 mm)
56 d/yr
Annual snowfall
8.5 cm
Average feels-like high
18.7 °C
Average feels-like low
7.1 °C
Average peak gust
35.3 km/h
Tropical nights (≥ 20 °C)
40 d/yr
Solar radiation
19.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.6 °C
since 1940
+0.3 °C per decade · r² = 0.59 · 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
41.4 °C
5 July 2021
Coldest day
-12.8 °C
13 December 1967
Wettest day
38 mm
31 August 1989
Windiest day
55.1 km/h
29 December 1951
Strongest gust
115.9 km/h
5 March 2009
Hottest feels-like
41.7 °C
12 July 2019
Coldest feels-like
-17.9 °C
13 December 1967
Snowiest day
15.2 cm
11 December 1967
Sunniest day
14.0 h
4 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 | 11.5 °C | +1.4 °C | 21 mm | -4 mm |
| Feb | 14.4 °C | +2.2 °C | 14 mm | -8 mm |
| Mar | 16.8 °C | +1.2 °C | 24 mm | -3 mm |
| Apr | 21.8 °C | +2.5 °C | 33 mm | +5 mm |
| May | 25.5 °C | +1.2 °C | 40 mm | +17 mm |
| Jun | 34.6 °C | +4.3 °C | 6 mm | -7 mm |
| Jul | 36.1 °C | +1.5 °C | 6 mm | +1 mm |
| Aug | 34.7 °C | +1.0 °C | 3 mm | -5 mm |
| Sep | 29.7 °C | +1.4 °C | 27 mm | +9 mm |
| Oct | 24.2 °C | +2.5 °C | 21 mm | -3 mm |
| Nov | 16.6 °C | +1.4 °C | 10 mm | -12 mm |
| Dec | 11.0 °C | +0.2 °C | 51 mm | +27 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 Deheb?
’Aïn Deheb has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 15.3 °C and it receives 240 mm of precipitation per year.
What is the hottest day ever recorded in ’Aïn Deheb?
The hottest day measured in ’Aïn Deheb between 1940 and 2025 was 5 July 2021, reaching 41.4 °C.
What is the coldest day in ’Aïn Deheb?
The coldest day measured in ’Aïn Deheb between 1940 and 2025 was 13 December 1967, at -12.8 °C.
Does it snow in ’Aïn Deheb?
Yes. ’Aïn Deheb gets on average 8.5 cm of snow per year and has around 28 frost days.
Has the climate of ’Aïn Deheb warmed?
Yes: ’Aïn Deheb warmed by +2.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in ’Aïn Deheb?
The wettest day measured in ’Aïn Deheb between 1940 and 2025 was 31 August 1989, with 38 mm of rain in 24 hours.
What was the windiest day in ’Aïn Deheb?
The windiest day measured in ’Aïn Deheb between 1940 and 2025 was 29 December 1951, with winds reaching 55.1 km/h.
What is the warmest month in ’Aïn Deheb?
The warmest month in ’Aïn Deheb is July (27.5 °C on average); the coldest is January (5.2 °C).
How much does it rain in ’Aïn Deheb?
’Aïn Deheb receives on average 240 mm of precipitation per year, spread over about 56 rainy days.
Is it sunny in ’Aïn Deheb?
’Aïn Deheb 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 ’Aïn Deheb?
The heaviest 24-hour snowfall measured in ’Aïn Deheb between 1940 and 2025 was 11 December 1967, with 15.2 cm.
Are there tropical nights in ’Aïn Deheb?
Yes: ’Aïn Deheb has on average 40 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in ’Aïn Deheb?
In ’Aïn Deheb, between 1940 and 2025, the highest apparent temperature reached 41.7 °C on 12 July 2019, and the lowest was -17.9 °C on 13 December 1967.
Compare ’Aïn Deheb with another city
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Nearby cities
The climate around ’Aïn Deheb