Mostaganem climate — normals and trends
Mostaganem (Algeria) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 18.7 °C and it receives 394 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 August (25.8 °C on average) and the coldest is January (13.1 °C). Rainfall peaks in December.
Mostaganem averages 0 frost days, 5 hot days (≥ 30 °C) and 61 rainy days per year.
Mostaganem has warmed by +1.3 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.5 °C (on 31 July 2001) and the coldest 3.7 °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
MostaganemMostaganem Province
- coords
- 35.93°, 0.09°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
18.7°C
Average daily high
20.6°C
Average daily low
16.9°C
Annual rainfall
394mm
Sunshine / day
11.0h
Mean relative humidity
77%
Average peak wind
21.9km/h
Seasonal range
12.7°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
61 d/yr
Annual snowfall
0.0 cm
Average feels-like high
21.0 °C
Average feels-like low
16.4 °C
Average peak gust
33.0 km/h
Tropical nights (≥ 20 °C)
118 d/yr
Solar radiation
18.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.3 °C
since 1940
+0.2 °C per decade · r² = 0.44 · 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
36.5 °C
31 July 2001
Coldest day
3.7 °C
27 January 2005
Wettest day
95 mm
10 November 2001
Windiest day
65.4 km/h
11 January 1960
Strongest gust
109.1 km/h
11 January 1960
Hottest feels-like
40.3 °C
31 July 2016
Coldest feels-like
-3.4 °C
21 December 1979
Snowiest day
0.2 cm
1 February 1954
Sunniest day
14.0 h
19 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 | 16.4 °C | +1.5 °C | 50 mm | -7 mm |
| Feb | 16.8 °C | +1.6 °C | 37 mm | -12 mm |
| Mar | 18.4 °C | +1.9 °C | 53 mm | +11 mm |
| Apr | 19.9 °C | +1.9 °C | 36 mm | -2 mm |
| May | 22.4 °C | +1.8 °C | 31 mm | +4 mm |
| Jun | 26.6 °C | +2.8 °C | 0 mm | -7 mm |
| Jul | 28.3 °C | +1.5 °C | 1 mm | +0 mm |
| Aug | 28.5 °C | +0.7 °C | 0 mm | -2 mm |
| Sep | 26.1 °C | +0.3 °C | 7 mm | -6 mm |
| Oct | 24.4 °C | +1.9 °C | 16 mm | -19 mm |
| Nov | 20.1 °C | +1.3 °C | 27 mm | -34 mm |
| Dec | 16.5 °C | +0.5 °C | 104 mm | +43 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 Mostaganem?
Mostaganem has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 18.7 °C and it receives 394 mm of precipitation per year.
What is the hottest day ever recorded in Mostaganem?
The hottest day measured in Mostaganem between 1940 and 2025 was 31 July 2001, reaching 36.5 °C.
What is the coldest day in Mostaganem?
The coldest day measured in Mostaganem between 1940 and 2025 was 27 January 2005, at 3.7 °C.
Does it snow in Mostaganem?
Almost never: Mostaganem sees virtually no snow, with about 0 frost days per year.
Has the climate of Mostaganem warmed?
Yes: Mostaganem warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Mostaganem?
The wettest day measured in Mostaganem between 1940 and 2025 was 10 November 2001, with 95 mm of rain in 24 hours.
What was the windiest day in Mostaganem?
The windiest day measured in Mostaganem between 1940 and 2025 was 11 January 1960, with winds reaching 65.4 km/h.
What is the warmest month in Mostaganem?
The warmest month in Mostaganem is August (25.8 °C on average); the coldest is January (13.1 °C).
How much does it rain in Mostaganem?
Mostaganem receives on average 394 mm of precipitation per year, spread over about 61 rainy days.
Is it sunny in Mostaganem?
Mostaganem gets on average 11.0 hours of sunshine per day, roughly 4,015 hours per year over 1940-2025.
What is the biggest single-day snowfall in Mostaganem?
The heaviest 24-hour snowfall measured in Mostaganem between 1940 and 2025 was 1 February 1954, with 0.2 cm.
Are there tropical nights in Mostaganem?
Yes: Mostaganem has on average 118 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Mostaganem?
In Mostaganem, between 1940 and 2025, the highest apparent temperature reached 40.3 °C on 31 July 2016, and the lowest was -3.4 °C on 21 December 1979.
Compare Mostaganem with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Mostaganem