Guerou climate — normals and trends
Guerou (Mauritania) has a hot desert climate (BWh) under the Köppen-Geiger classification. Its mean annual temperature is 29.3 °C and it receives 172 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 May (34.6 °C on average) and the coldest is January (22.2 °C). Rainfall peaks in August.
Guerou averages 0 frost days, 306 hot days (≥ 30 °C) and 26 rainy days per year.
Guerou has warmed by +3.0 °C between 1940 and 2025, or +0.35 °C per decade. This trend is statistically significant.
The hottest day of the period reached 46.9 °C (on 6 June 2021) and the coldest 8.2 °C (on 9 January 1965).
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
GuerouAssaba
- coords
- 17.08°, -12.04°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
29.3°C
Average daily high
35.0°C
Average daily low
23.7°C
Annual rainfall
172mm
Sunshine / day
11.2h
Mean relative humidity
31%
Average peak wind
21.3km/h
Seasonal range
12.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
306 d/yr
Rainy days (≥ 1 mm)
26 d/yr
Annual snowfall
0.0 cm
Average feels-like high
34.0 °C
Average feels-like low
21.8 °C
Average peak gust
39.5 km/h
Tropical nights (≥ 20 °C)
281 d/yr
Solar radiation
23.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.0 °C
since 1940
+0.4 °C per decade · r² = 0.74 · 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
46.9 °C
6 June 2021
Coldest day
8.2 °C
9 January 1965
Wettest day
173 mm
14 August 2010
Windiest day
43.6 km/h
4 March 2004
Strongest gust
76.3 km/h
26 February 2015
Hottest feels-like
47.0 °C
3 June 2016
Coldest feels-like
1.7 °C
30 December 1940
Sunniest day
12.6 h
28 May 1941
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 29.2 °C | +0.9 °C | 0 mm | -1 mm |
| Feb | 31.4 °C | 0.0 °C | 0 mm | -1 mm |
| Mar | 37.7 °C | +2.7 °C | 0 mm | -0 mm |
| Apr | 40.5 °C | +2.2 °C | 1 mm | +1 mm |
| May | 42.3 °C | +1.9 °C | 0 mm | -1 mm |
| Jun | 40.1 °C | +0.1 °C | 2 mm | -3 mm |
| Jul | 36.4 °C | -0.4 °C | 18 mm | -6 mm |
| Aug | 34.4 °C | -0.2 °C | 73 mm | +2 mm |
| Sep | 35.0 °C | -0.6 °C | 159 mm | +107 mm |
| Oct | 39.3 °C | +2.3 °C | 3 mm | -10 mm |
| Nov | 36.0 °C | +2.3 °C | 0 mm | -2 mm |
| Dec | 28.4 °C | -0.5 °C | 0 mm | -1 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 Guerou?
Guerou has a hot desert climate (Köppen BWh). Over 1940-2025, the average annual temperature is 29.3 °C and it receives 172 mm of precipitation per year.
What is the hottest day ever recorded in Guerou?
The hottest day measured in Guerou between 1940 and 2025 was 6 June 2021, reaching 46.9 °C.
What is the coldest day in Guerou?
The coldest day measured in Guerou between 1940 and 2025 was 9 January 1965, at 8.2 °C.
Does it snow in Guerou?
Almost never: Guerou sees virtually no snow, with about 0 frost days per year.
Has the climate of Guerou warmed?
Yes: Guerou warmed by +3.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Guerou?
The wettest day measured in Guerou between 1940 and 2025 was 14 August 2010, with 173 mm of rain in 24 hours.
What was the windiest day in Guerou?
The windiest day measured in Guerou between 1940 and 2025 was 4 March 2004, with winds reaching 43.6 km/h.
What is the warmest month in Guerou?
The warmest month in Guerou is May (34.6 °C on average); the coldest is January (22.2 °C).
How much does it rain in Guerou?
Guerou receives on average 172 mm of precipitation per year, spread over about 26 rainy days.
Is it sunny in Guerou?
Guerou gets on average 11.2 hours of sunshine per day, roughly 4,088 hours per year over 1940-2025.
Are there tropical nights in Guerou?
Yes: Guerou has on average 281 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Guerou?
In Guerou, between 1940 and 2025, the highest apparent temperature reached 47.0 °C on 3 June 2016, and the lowest was 1.7 °C on 30 December 1940.
Compare Guerou with another city
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Nearby cities
The climate around Guerou