Collo climate — normals and trends
Collo (Algeria) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 17.8 °C and it receives 792 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 (25.9 °C on average) and the coldest is January (11.4 °C). Rainfall peaks in December.
Collo averages 0 frost days, 25 hot days (≥ 30 °C) and 108 rainy days per year.
Collo has warmed by +2.2 °C between 1940 and 2025, or +0.26 °C per decade. This trend is statistically significant.
The hottest day of the period reached 40.8 °C (on 24 July 2023) and the coldest 0.6 °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
ColloSkikda Province
- coords
- 37.01°, 6.56°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.8°C
Average daily high
20.7°C
Average daily low
15.1°C
Annual rainfall
792mm
Sunshine / day
10.5h
Mean relative humidity
77%
Average peak wind
16.4km/h
Seasonal range
14.5°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
25 d/yr
Rainy days (≥ 1 mm)
108 d/yr
Annual snowfall
0.3 cm
Average feels-like high
21.2 °C
Average feels-like low
14.7 °C
Average peak gust
35.8 km/h
Tropical nights (≥ 20 °C)
91 d/yr
Solar radiation
17.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.2 °C
since 1940
+0.3 °C per decade · r² = 0.71 · 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
40.8 °C
24 July 2023
Coldest day
0.6 °C
2 February 1999
Wettest day
99 mm
28 November 1967
Windiest day
52.3 km/h
27 November 1982
Strongest gust
123.1 km/h
24 January 2013
Hottest feels-like
44.6 °C
18 July 2023
Coldest feels-like
-4.7 °C
2 February 1956
Snowiest day
4.5 cm
18 January 1940
Sunniest day
14.0 h
21 June 2025
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 | 16.0 °C | +2.1 °C | 157 mm | +46 mm |
| Feb | 16.1 °C | +1.8 °C | 78 mm | -15 mm |
| Mar | 17.9 °C | +2.0 °C | 123 mm | +41 mm |
| Apr | 19.8 °C | +2.0 °C | 88 mm | +18 mm |
| May | 22.5 °C | +1.4 °C | 91 mm | +45 mm |
| Jun | 28.1 °C | +3.1 °C | 0 mm | -16 mm |
| Jul | 29.5 °C | +1.1 °C | 1 mm | -3 mm |
| Aug | 29.8 °C | +0.7 °C | 3 mm | -7 mm |
| Sep | 28.1 °C | +1.5 °C | 65 mm | +18 mm |
| Oct | 24.2 °C | +1.4 °C | 52 mm | -30 mm |
| Nov | 19.1 °C | +0.7 °C | 155 mm | +47 mm |
| Dec | 16.0 °C | +0.9 °C | 104 mm | -17 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 Collo?
Collo has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 17.8 °C and it receives 792 mm of precipitation per year.
What is the hottest day ever recorded in Collo?
The hottest day measured in Collo between 1940 and 2025 was 24 July 2023, reaching 40.8 °C.
What is the coldest day in Collo?
The coldest day measured in Collo between 1940 and 2025 was 2 February 1999, at 0.6 °C.
Does it snow in Collo?
Almost never: Collo sees virtually no snow, with about 0 frost days per year.
Has the climate of Collo warmed?
Yes: Collo warmed by +2.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Collo?
The wettest day measured in Collo between 1940 and 2025 was 28 November 1967, with 99 mm of rain in 24 hours.
What was the windiest day in Collo?
The windiest day measured in Collo between 1940 and 2025 was 27 November 1982, with winds reaching 52.3 km/h.
What is the warmest month in Collo?
The warmest month in Collo is August (25.9 °C on average); the coldest is January (11.4 °C).
How much does it rain in Collo?
Collo receives on average 792 mm of precipitation per year, spread over about 108 rainy days.
Is it sunny in Collo?
Collo 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 Collo?
The heaviest 24-hour snowfall measured in Collo between 1940 and 2025 was 18 January 1940, with 4.5 cm.
Are there tropical nights in Collo?
Yes: Collo has on average 91 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Collo?
In Collo, between 1940 and 2025, the highest apparent temperature reached 44.6 °C on 18 July 2023, and the lowest was -4.7 °C on 2 February 1956.
Compare Collo with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Collo