Bou Saâda climate — normals and trends
Bou Saâda (Algeria) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 17.7 °C and it receives 259 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 (30.0 °C on average) and the coldest is January (7.4 °C). Rainfall peaks in September.
Bou Saâda averages 8 frost days, 112 hot days (≥ 30 °C) and 53 rainy days per year.
Bou Saâda 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 16 to 0 per year over the period.
The hottest day of the period reached 45.6 °C (on 29 July 2023) and the coldest -5.4 °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
Bou SaâdaM'Sila Province
- coords
- 35.21°, 4.17°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.7°C
Average daily high
23.6°C
Average daily low
12.1°C
Annual rainfall
259mm
Sunshine / day
10.9h
Mean relative humidity
53%
Average peak wind
17.6km/h
Seasonal range
22.6°C
Frost days (< 0 °C)
8 d/yr
Hot days (≥ 30 °C)
112 d/yr
Rainy days (≥ 1 mm)
53 d/yr
Annual snowfall
1.8 cm
Average feels-like high
21.5 °C
Average feels-like low
9.8 °C
Average peak gust
34.5 km/h
Tropical nights (≥ 20 °C)
75 d/yr
Solar radiation
19.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.0 °C
since 1940
+0.4 °C per decade · r² = 0.66 · 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
45.6 °C
29 July 2023
Coldest day
-5.4 °C
30 December 1940
Wettest day
63 mm
6 March 1986
Windiest day
51.3 km/h
31 January 2015
Strongest gust
104.0 km/h
5 March 2009
Hottest feels-like
45.2 °C
23 July 2010
Coldest feels-like
-9.8 °C
30 December 1940
Snowiest day
15.4 cm
5 January 1965
Sunniest day
14.0 h
25 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 | 14.6 °C | +2.4 °C | 19 mm | -3 mm |
| Feb | 17.1 °C | +2.7 °C | 7 mm | -10 mm |
| Mar | 20.0 °C | +2.0 °C | 21 mm | -5 mm |
| Apr | 23.7 °C | +1.9 °C | 55 mm | +26 mm |
| May | 28.0 °C | +1.0 °C | 48 mm | +20 mm |
| Jun | 36.9 °C | +4.0 °C | 2 mm | -14 mm |
| Jul | 38.6 °C | +1.7 °C | 8 mm | +0 mm |
| Aug | 37.2 °C | +1.3 °C | 7 mm | -5 mm |
| Sep | 32.1 °C | +1.9 °C | 64 mm | +32 mm |
| Oct | 25.0 °C | +1.3 °C | 27 mm | -2 mm |
| Nov | 18.4 °C | +1.2 °C | 4 mm | -17 mm |
| Dec | 13.7 °C | +0.8 °C | 33 mm | +13 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 Bou Saâda?
Bou Saâda has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 17.7 °C and it receives 259 mm of precipitation per year.
What is the hottest day ever recorded in Bou Saâda?
The hottest day measured in Bou Saâda between 1940 and 2025 was 29 July 2023, reaching 45.6 °C.
What is the coldest day in Bou Saâda?
The coldest day measured in Bou Saâda between 1940 and 2025 was 30 December 1940, at -5.4 °C.
Does it snow in Bou Saâda?
Yes. Bou Saâda gets on average 1.8 cm of snow per year and has around 8 frost days.
Has the climate of Bou Saâda warmed?
Yes: Bou Saâda warmed by +3.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bou Saâda?
The wettest day measured in Bou Saâda between 1940 and 2025 was 6 March 1986, with 63 mm of rain in 24 hours.
What was the windiest day in Bou Saâda?
The windiest day measured in Bou Saâda between 1940 and 2025 was 31 January 2015, with winds reaching 51.3 km/h.
What is the warmest month in Bou Saâda?
The warmest month in Bou Saâda is July (30.0 °C on average); the coldest is January (7.4 °C).
How much does it rain in Bou Saâda?
Bou Saâda receives on average 259 mm of precipitation per year, spread over about 53 rainy days.
Is it sunny in Bou Saâda?
Bou Saâda gets on average 10.9 hours of sunshine per day, roughly 3,979 hours per year over 1940-2025.
What is the biggest single-day snowfall in Bou Saâda?
The heaviest 24-hour snowfall measured in Bou Saâda between 1940 and 2025 was 5 January 1965, with 15.4 cm.
Are there tropical nights in Bou Saâda?
Yes: Bou Saâda has on average 75 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Bou Saâda?
In Bou Saâda, between 1940 and 2025, the highest apparent temperature reached 45.2 °C on 23 July 2010, and the lowest was -9.8 °C on 30 December 1940.
Compare Bou Saâda with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bou Saâda