Ain Defla climate — normals and trends
Ain Defla (Algeria) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 16.6 °C and it receives 527 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 (26.6 °C on average) and the coldest is January (8.2 °C). Rainfall peaks in January.
Ain Defla averages 7 frost days, 85 hot days (≥ 30 °C) and 85 rainy days per year.
Ain Defla has warmed by +2.5 °C between 1940 and 2025, or +0.29 °C per decade. This trend is statistically significant.
The number of frost days there went from about 12 to 2 per year over the period.
The hottest day of the period reached 44.5 °C (on 23 July 2023) and the coldest -14.1 °C (on 27 January 2005).
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
Ain DeflaAïn Defla Province
- coords
- 36.26°, 1.97°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
16.6°C
Average daily high
22.5°C
Average daily low
11.4°C
Annual rainfall
527mm
Sunshine / day
10.6h
Mean relative humidity
66%
Average peak wind
13.3km/h
Seasonal range
18.4°C
Frost days (< 0 °C)
7 d/yr
Hot days (≥ 30 °C)
85 d/yr
Rainy days (≥ 1 mm)
85 d/yr
Annual snowfall
5.4 cm
Average feels-like high
21.7 °C
Average feels-like low
10.1 °C
Average peak gust
36.1 km/h
Tropical nights (≥ 20 °C)
42 d/yr
Solar radiation
18.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.55 · 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
44.5 °C
23 July 2023
Coldest day
-14.1 °C
27 January 2005
Wettest day
95 mm
14 January 1961
Windiest day
40.7 km/h
11 March 1975
Strongest gust
118.1 km/h
1 December 1959
Hottest feels-like
45.7 °C
23 July 2023
Coldest feels-like
-18.3 °C
27 January 2005
Snowiest day
16.2 cm
21 December 1979
Sunniest day
14.0 h
28 May 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 | 15.0 °C | +1.9 °C | 92 mm | +23 mm |
| Feb | 17.1 °C | +2.7 °C | 41 mm | -21 mm |
| Mar | 18.9 °C | +1.9 °C | 51 mm | -13 mm |
| Apr | 23.1 °C | +3.4 °C | 39 mm | -24 mm |
| May | 25.7 °C | +1.7 °C | 75 mm | +30 mm |
| Jun | 34.6 °C | +5.5 °C | 3 mm | -11 mm |
| Jul | 34.6 °C | +1.0 °C | 4 mm | -0 mm |
| Aug | 35.3 °C | +1.6 °C | 3 mm | -5 mm |
| Sep | 31.6 °C | +2.2 °C | 22 mm | -5 mm |
| Oct | 26.5 °C | +2.8 °C | 21 mm | -27 mm |
| Nov | 19.6 °C | +1.8 °C | 32 mm | -28 mm |
| Dec | 15.1 °C | +1.1 °C | 68 mm | +3 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 Ain Defla?
Ain Defla has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 16.6 °C and it receives 527 mm of precipitation per year.
What is the hottest day ever recorded in Ain Defla?
The hottest day measured in Ain Defla between 1940 and 2025 was 23 July 2023, reaching 44.5 °C.
What is the coldest day in Ain Defla?
The coldest day measured in Ain Defla between 1940 and 2025 was 27 January 2005, at -14.1 °C.
Does it snow in Ain Defla?
Yes. Ain Defla gets on average 5.4 cm of snow per year and has around 7 frost days.
Has the climate of Ain Defla warmed?
Yes: Ain Defla warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ain Defla?
The wettest day measured in Ain Defla between 1940 and 2025 was 14 January 1961, with 95 mm of rain in 24 hours.
What was the windiest day in Ain Defla?
The windiest day measured in Ain Defla between 1940 and 2025 was 11 March 1975, with winds reaching 40.7 km/h.
What is the warmest month in Ain Defla?
The warmest month in Ain Defla is July (26.6 °C on average); the coldest is January (8.2 °C).
How much does it rain in Ain Defla?
Ain Defla receives on average 527 mm of precipitation per year, spread over about 85 rainy days.
Is it sunny in Ain Defla?
Ain Defla 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 Ain Defla?
The heaviest 24-hour snowfall measured in Ain Defla between 1940 and 2025 was 21 December 1979, with 16.2 cm.
Are there tropical nights in Ain Defla?
Yes: Ain Defla has on average 42 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Ain Defla?
In Ain Defla, between 1940 and 2025, the highest apparent temperature reached 45.7 °C on 23 July 2023, and the lowest was -18.3 °C on 27 January 2005.
Compare Ain Defla with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ain Defla