Constantine climate — normals and trends
Constantine (Algeria) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 15.4 °C and it receives 436 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 (25.7 °C on average) and the coldest is January (6.7 °C). Rainfall peaks in March.
Constantine averages 13 frost days, 77 hot days (≥ 30 °C) and 90 rainy days per year.
Constantine 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 24 to 2 per year over the period.
The hottest day of the period reached 42.7 °C (on 4 July 2018) and the coldest -12.9 °C (on 2 February 1999).
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
ConstantineConstantine Province
- coords
- 36.37°, 6.61°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
15.4°C
Average daily high
21.5°C
Average daily low
10.1°C
Annual rainfall
436mm
Sunshine / day
10.2h
Mean relative humidity
67%
Average peak wind
13.5km/h
Seasonal range
19.0°C
Frost days (< 0 °C)
13 d/yr
Hot days (≥ 30 °C)
77 d/yr
Rainy days (≥ 1 mm)
90 d/yr
Annual snowfall
10.7 cm
Average feels-like high
20.4 °C
Average feels-like low
8.8 °C
Average peak gust
35.2 km/h
Tropical nights (≥ 20 °C)
28 d/yr
Solar radiation
17.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.0 °C
since 1940
+0.4 °C per decade · r² = 0.72 · 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
42.7 °C
4 July 2018
Coldest day
-12.9 °C
2 February 1999
Wettest day
57 mm
28 November 1967
Windiest day
36.6 km/h
11 November 1951
Strongest gust
105.8 km/h
2 February 1956
Hottest feels-like
44.1 °C
28 July 2005
Coldest feels-like
-17.3 °C
2 February 1999
Snowiest day
16.0 cm
14 January 1995
Sunniest day
13.9 h
21 June 1941
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 | 13.8 °C | +2.2 °C | 75 mm | +30 mm |
| Feb | 15.0 °C | +2.0 °C | 28 mm | -15 mm |
| Mar | 18.6 °C | +2.8 °C | 43 mm | -9 mm |
| Apr | 21.1 °C | +2.2 °C | 61 mm | +9 mm |
| May | 24.2 °C | +0.5 °C | 75 mm | +30 mm |
| Jun | 32.8 °C | +3.8 °C | 5 mm | -16 mm |
| Jul | 34.3 °C | +1.2 °C | 8 mm | -2 mm |
| Aug | 33.8 °C | +1.0 °C | 6 mm | -11 mm |
| Sep | 30.1 °C | +1.9 °C | 49 mm | +16 mm |
| Oct | 24.2 °C | +1.5 °C | 23 mm | -13 mm |
| Nov | 17.7 °C | +1.0 °C | 33 mm | -5 mm |
| Dec | 13.7 °C | +1.2 °C | 44 mm | -2 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 Constantine?
Constantine has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 15.4 °C and it receives 436 mm of precipitation per year.
What is the hottest day ever recorded in Constantine?
The hottest day measured in Constantine between 1940 and 2025 was 4 July 2018, reaching 42.7 °C.
What is the coldest day in Constantine?
The coldest day measured in Constantine between 1940 and 2025 was 2 February 1999, at -12.9 °C.
Does it snow in Constantine?
Yes. Constantine gets on average 10.7 cm of snow per year and has around 13 frost days.
Has the climate of Constantine warmed?
Yes: Constantine warmed by +3.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Constantine?
The wettest day measured in Constantine between 1940 and 2025 was 28 November 1967, with 57 mm of rain in 24 hours.
What was the windiest day in Constantine?
The windiest day measured in Constantine between 1940 and 2025 was 11 November 1951, with winds reaching 36.6 km/h.
What is the warmest month in Constantine?
The warmest month in Constantine is July (25.7 °C on average); the coldest is January (6.7 °C).
How much does it rain in Constantine?
Constantine receives on average 436 mm of precipitation per year, spread over about 90 rainy days.
Is it sunny in Constantine?
Constantine gets on average 10.2 hours of sunshine per day, roughly 3,723 hours per year over 1940-2025.
What is the biggest single-day snowfall in Constantine?
The heaviest 24-hour snowfall measured in Constantine between 1940 and 2025 was 14 January 1995, with 16.0 cm.
Are there tropical nights in Constantine?
Yes: Constantine has on average 28 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Constantine?
In Constantine, between 1940 and 2025, the highest apparent temperature reached 44.1 °C on 28 July 2005, and the lowest was -17.3 °C on 2 February 1999.
Compare Constantine with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Constantine