El ’Ayoûn climate — normals and trends
El ’Ayoûn (Mauritania) has a hot desert climate (BWh) under the Köppen-Geiger classification. Its mean annual temperature is 29.7 °C and it receives 398 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 (35.2 °C on average) and the coldest is January (24.5 °C). Rainfall peaks in August.
El ’Ayoûn averages 0 frost days, 335 hot days (≥ 30 °C) and 49 rainy days per year.
El ’Ayoûn has warmed by +2.8 °C between 1940 and 2025, or +0.32 °C per decade. This trend is statistically significant.
The hottest day of the period reached 46.7 °C (on 22 April 2016) and the coldest 10.7 °C (on 28 December 1960).
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
El ’AyoûnAssaba
- coords
- 15.56°, -11.18°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
29.7°C
Average daily high
35.8°C
Average daily low
24.3°C
Annual rainfall
398mm
Sunshine / day
11.0h
Mean relative humidity
36%
Average peak wind
19.6km/h
Seasonal range
10.7°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
335 d/yr
Rainy days (≥ 1 mm)
49 d/yr
Annual snowfall
0.0 cm
Average feels-like high
36.0 °C
Average feels-like low
22.9 °C
Average peak gust
36.6 km/h
Tropical nights (≥ 20 °C)
309 d/yr
Solar radiation
22.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.8 °C
since 1940
+0.3 °C per decade · r² = 0.70 · 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
46.7 °C
22 April 2016
Coldest day
10.7 °C
28 December 1960
Wettest day
161 mm
3 September 2003
Windiest day
39.3 km/h
9 April 2012
Strongest gust
78.1 km/h
7 September 1956
Hottest feels-like
48.1 °C
24 May 1998
Coldest feels-like
4.3 °C
28 December 1960
Sunniest day
12.6 h
23 May 1988
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 | 31.9 °C | +0.3 °C | 0 mm | -1 mm |
| Feb | 33.7 °C | -0.8 °C | 0 mm | -1 mm |
| Mar | 39.5 °C | +1.8 °C | 0 mm | -0 mm |
| Apr | 41.9 °C | +1.5 °C | 0 mm | -1 mm |
| May | 42.0 °C | +0.7 °C | 2 mm | -3 mm |
| Jun | 38.3 °C | -1.0 °C | 7 mm | -15 mm |
| Jul | 34.4 °C | -0.6 °C | 21 mm | -60 mm |
| Aug | 32.1 °C | -0.2 °C | 215 mm | +68 mm |
| Sep | 32.7 °C | -0.5 °C | 113 mm | +4 mm |
| Oct | 36.7 °C | +0.4 °C | 13 mm | -16 mm |
| Nov | 36.2 °C | +0.5 °C | 0 mm | -2 mm |
| Dec | 31.1 °C | -0.9 °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 El ’Ayoûn?
El ’Ayoûn has a hot desert climate (Köppen BWh). Over 1940-2025, the average annual temperature is 29.7 °C and it receives 398 mm of precipitation per year.
What is the hottest day ever recorded in El ’Ayoûn?
The hottest day measured in El ’Ayoûn between 1940 and 2025 was 22 April 2016, reaching 46.7 °C.
What is the coldest day in El ’Ayoûn?
The coldest day measured in El ’Ayoûn between 1940 and 2025 was 28 December 1960, at 10.7 °C.
Does it snow in El ’Ayoûn?
Almost never: El ’Ayoûn sees virtually no snow, with about 0 frost days per year.
Has the climate of El ’Ayoûn warmed?
Yes: El ’Ayoûn warmed by +2.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in El ’Ayoûn?
The wettest day measured in El ’Ayoûn between 1940 and 2025 was 3 September 2003, with 161 mm of rain in 24 hours.
What was the windiest day in El ’Ayoûn?
The windiest day measured in El ’Ayoûn between 1940 and 2025 was 9 April 2012, with winds reaching 39.3 km/h.
What is the warmest month in El ’Ayoûn?
The warmest month in El ’Ayoûn is May (35.2 °C on average); the coldest is January (24.5 °C).
How much does it rain in El ’Ayoûn?
El ’Ayoûn receives on average 398 mm of precipitation per year, spread over about 49 rainy days.
Is it sunny in El ’Ayoûn?
El ’Ayoûn gets on average 11.0 hours of sunshine per day, roughly 4,015 hours per year over 1940-2025.
Are there tropical nights in El ’Ayoûn?
Yes: El ’Ayoûn has on average 309 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in El ’Ayoûn?
In El ’Ayoûn, between 1940 and 2025, the highest apparent temperature reached 48.1 °C on 24 May 1998, and the lowest was 4.3 °C on 28 December 1960.
Compare El ’Ayoûn with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around El ’Ayoûn