Aïn Oulmene climate — normals and trends
Aïn Oulmene (Algeria) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 14.2 °C and it receives 407 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 (25.3 °C on average) and the coldest is January (4.9 °C). Rainfall peaks in April.
Aïn Oulmene averages 25 frost days, 62 hot days (≥ 30 °C) and 85 rainy days per year.
Aïn Oulmene 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 41 to 9 per year over the period.
The hottest day of the period reached 40.7 °C (on 29 July 2023) and the coldest -11.6 °C (on 30 December 1940).
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 OulmeneSétif Province
- coords
- 35.92°, 5.30°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.2°C
Average daily high
19.7°C
Average daily low
9.3°C
Annual rainfall
407mm
Sunshine / day
10.6h
Mean relative humidity
64%
Average peak wind
14.2km/h
Seasonal range
20.4°C
Frost days (< 0 °C)
25 d/yr
Hot days (≥ 30 °C)
62 d/yr
Rainy days (≥ 1 mm)
85 d/yr
Annual snowfall
24.3 cm
Average feels-like high
17.9 °C
Average feels-like low
7.4 °C
Average peak gust
36.9 km/h
Tropical nights (≥ 20 °C)
27 d/yr
Solar radiation
18.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.9 °C
since 1940
+0.3 °C per decade · r² = 0.69 · 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
40.7 °C
29 July 2023
Coldest day
-11.6 °C
30 December 1940
Wettest day
55 mm
11 September 2019
Windiest day
42.2 km/h
7 November 1962
Strongest gust
95.8 km/h
24 June 2014
Hottest feels-like
40.9 °C
30 July 2023
Coldest feels-like
-15.4 °C
31 December 1940
Snowiest day
27.2 cm
12 December 1967
Sunniest day
14.0 h
17 June 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 | 11.3 °C | +2.0 °C | 52 mm | +14 mm |
| Feb | 13.0 °C | +2.1 °C | 23 mm | -13 mm |
| Mar | 16.0 °C | +2.1 °C | 33 mm | -12 mm |
| Apr | 19.4 °C | +2.1 °C | 67 mm | +19 mm |
| May | 23.5 °C | +1.1 °C | 74 mm | +28 mm |
| Jun | 31.8 °C | +3.7 °C | 6 mm | -19 mm |
| Jul | 33.2 °C | +1.1 °C | 11 mm | +1 mm |
| Aug | 32.3 °C | +0.9 °C | 15 mm | -3 mm |
| Sep | 27.8 °C | +1.6 °C | 63 mm | +25 mm |
| Oct | 21.7 °C | +1.5 °C | 26 mm | -8 mm |
| Nov | 14.6 °C | +0.5 °C | 25 mm | -8 mm |
| Dec | 11.4 °C | +1.3 °C | 42 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 Oulmene?
Aïn Oulmene has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 14.2 °C and it receives 407 mm of precipitation per year.
What is the hottest day ever recorded in Aïn Oulmene?
The hottest day measured in Aïn Oulmene between 1940 and 2025 was 29 July 2023, reaching 40.7 °C.
What is the coldest day in Aïn Oulmene?
The coldest day measured in Aïn Oulmene between 1940 and 2025 was 30 December 1940, at -11.6 °C.
Does it snow in Aïn Oulmene?
Yes. Aïn Oulmene gets on average 24.3 cm of snow per year and has around 25 frost days.
Has the climate of Aïn Oulmene warmed?
Yes: Aïn Oulmene warmed by +2.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Aïn Oulmene?
The wettest day measured in Aïn Oulmene between 1940 and 2025 was 11 September 2019, with 55 mm of rain in 24 hours.
What was the windiest day in Aïn Oulmene?
The windiest day measured in Aïn Oulmene between 1940 and 2025 was 7 November 1962, with winds reaching 42.2 km/h.
What is the warmest month in Aïn Oulmene?
The warmest month in Aïn Oulmene is July (25.3 °C on average); the coldest is January (4.9 °C).
How much does it rain in Aïn Oulmene?
Aïn Oulmene receives on average 407 mm of precipitation per year, spread over about 85 rainy days.
Is it sunny in Aïn Oulmene?
Aïn Oulmene gets on average 10.6 hours of sunshine per day, roughly 3,869 hours per year over 1940-2025.
What is the biggest single-day snowfall in Aïn Oulmene?
The heaviest 24-hour snowfall measured in Aïn Oulmene between 1940 and 2025 was 12 December 1967, with 27.2 cm.
Are there tropical nights in Aïn Oulmene?
Yes: Aïn Oulmene 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 Oulmene?
In Aïn Oulmene, between 1940 and 2025, the highest apparent temperature reached 40.9 °C on 30 July 2023, and the lowest was -15.4 °C on 31 December 1940.
Compare Aïn Oulmene with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Aïn Oulmene