Sidi Aïssa climate — normals and trends
Sidi Aïssa (Algeria) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 15.4 °C and it receives 369 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 (26.7 °C on average) and the coldest is January (5.9 °C). Rainfall peaks in April.
Sidi Aïssa averages 19 frost days, 85 hot days (≥ 30 °C) and 77 rainy days per year.
Sidi Aïssa has warmed by +3.0 °C between 1940 and 2025, or +0.35 °C per decade. This trend is statistically significant.
The number of frost days there went from about 32 to 6 per year over the period.
The hottest day of the period reached 42.6 °C (on 27 June 2024) and the coldest -11.1 °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
Sidi AïssaM'Sila Province
- coords
- 35.89°, 3.77°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.4°C
Average daily high
21.3°C
Average daily low
10.0°C
Annual rainfall
369mm
Sunshine / day
10.5h
Mean relative humidity
63%
Average peak wind
16.0km/h
Seasonal range
20.8°C
Frost days (< 0 °C)
19 d/yr
Hot days (≥ 30 °C)
85 d/yr
Rainy days (≥ 1 mm)
77 d/yr
Annual snowfall
10.6 cm
Average feels-like high
19.5 °C
Average feels-like low
8.1 °C
Average peak gust
36.5 km/h
Tropical nights (≥ 20 °C)
39 d/yr
Solar radiation
18.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.0 °C
since 1940
+0.4 °C per decade · r² = 0.65 · 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
42.6 °C
27 June 2024
Coldest day
-11.1 °C
27 January 2005
Wettest day
48 mm
24 May 2004
Windiest day
44.0 km/h
21 February 2004
Strongest gust
99.7 km/h
5 March 2009
Hottest feels-like
43.1 °C
29 July 2023
Coldest feels-like
-15.8 °C
27 January 2005
Snowiest day
17.4 cm
19 December 1999
Sunniest day
14.0 h
13 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 | 12.6 °C | +2.1 °C | 43 mm | +5 mm |
| Feb | 15.0 °C | +2.7 °C | 12 mm | -22 mm |
| Mar | 17.1 °C | +1.6 °C | 35 mm | -7 mm |
| Apr | 21.3 °C | +2.3 °C | 49 mm | +2 mm |
| May | 24.9 °C | +0.9 °C | 68 mm | +33 mm |
| Jun | 34.2 °C | +4.4 °C | 13 mm | -6 mm |
| Jul | 35.8 °C | +1.8 °C | 9 mm | +2 mm |
| Aug | 34.9 °C | +1.5 °C | 6 mm | -7 mm |
| Sep | 30.3 °C | +2.2 °C | 40 mm | +10 mm |
| Oct | 23.9 °C | +2.1 °C | 30 mm | -4 mm |
| Nov | 16.5 °C | +1.1 °C | 24 mm | -9 mm |
| Dec | 12.3 °C | +1.1 °C | 46 mm | +10 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 Sidi Aïssa?
Sidi Aïssa has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 15.4 °C and it receives 369 mm of precipitation per year.
What is the hottest day ever recorded in Sidi Aïssa?
The hottest day measured in Sidi Aïssa between 1940 and 2025 was 27 June 2024, reaching 42.6 °C.
What is the coldest day in Sidi Aïssa?
The coldest day measured in Sidi Aïssa between 1940 and 2025 was 27 January 2005, at -11.1 °C.
Does it snow in Sidi Aïssa?
Yes. Sidi Aïssa gets on average 10.6 cm of snow per year and has around 19 frost days.
Has the climate of Sidi Aïssa warmed?
Yes: Sidi Aïssa warmed by +3.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Sidi Aïssa?
The wettest day measured in Sidi Aïssa between 1940 and 2025 was 24 May 2004, with 48 mm of rain in 24 hours.
What was the windiest day in Sidi Aïssa?
The windiest day measured in Sidi Aïssa between 1940 and 2025 was 21 February 2004, with winds reaching 44.0 km/h.
What is the warmest month in Sidi Aïssa?
The warmest month in Sidi Aïssa is July (26.7 °C on average); the coldest is January (5.9 °C).
How much does it rain in Sidi Aïssa?
Sidi Aïssa receives on average 369 mm of precipitation per year, spread over about 77 rainy days.
Is it sunny in Sidi Aïssa?
Sidi Aïssa 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 Sidi Aïssa?
The heaviest 24-hour snowfall measured in Sidi Aïssa between 1940 and 2025 was 19 December 1999, with 17.4 cm.
Are there tropical nights in Sidi Aïssa?
Yes: Sidi Aïssa has on average 39 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Sidi Aïssa?
In Sidi Aïssa, between 1940 and 2025, the highest apparent temperature reached 43.1 °C on 29 July 2023, and the lowest was -15.8 °C on 27 January 2005.
Compare Sidi Aïssa with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Sidi Aïssa