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Atar, Mauritania climate
BWh Hot desert
Atar has a seasonal tropical climate (Hot desert, Köppen BWh). The hottest month is July with an average daily high near 42°C, while the coldest is January averaging around 12°C at night. Precipitation totals about 59 mm a year and is strongly seasonal — September alone averages 15 mm while May barely receives 1 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Atar climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 29 | 33 | 36 | 39 | 42 | 42 | 41 | 39 | 37 | 32 | 28 |
| Avg temp (°C) | 19 | 21 | 24 | 28 | 31 | 34 | 34 | 34 | 33 | 30 | 25 | 21 |
| Avg low (°C) | 12 | 14 | 16 | 19 | 23 | 26 | 27 | 27 | 26 | 23 | 18 | 14 |
| Precipitation (mm) | 3 | 2 | 2 | 1 | 1 | 2 | 3 | 15 | 15 | 8 | 3 | 5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 29 | 33 | 36 | 39 | 42 |
| Avg temp (°C) | 19 | 21 | 24 | 28 | 31 | 34 |
| Avg low (°C) | 12 | 14 | 16 | 19 | 23 | 26 |
| Precipitation (mm) | 3 | 2 | 2 | 1 | 1 | 2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 42 | 41 | 39 | 37 | 32 | 28 |
| Avg temp (°C) | 34 | 34 | 33 | 30 | 25 | 21 |
| Avg low (°C) | 27 | 27 | 26 | 23 | 18 | 14 |
| Precipitation (mm) | 3 | 15 | 15 | 8 | 3 | 5 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with high ≥ 32°C (days) | 0.9 | 6 | 17 | 26 | 31 | 30 | 31 | 31 | 29 | 29 | 13 | 2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with high ≥ 32°C (days) | 0.9 | 6 | 17 | 26 | 31 | 30 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with high ≥ 32°C (days) | 31 | 31 | 29 | 29 | 13 | 2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 36 | 38 | 29 | 30 | 29 | 27 | 30 | 38 | 38 | 32 | 39 | 40 |
| Relative humidity (%) | 26 | 24 | 21 | 19 | 17 | 17 | 24 | 31 | 30 | 27 | 27 | 28 |
| Wind speed (mph) | 8.9 | 8.6 | 7.8 | 7.7 | 8.1 | 9.3 | 8.6 | 7.9 | 7.9 | 7.5 | 7.5 | 8.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 36 | 38 | 29 | 30 | 29 | 27 |
| Relative humidity (%) | 26 | 24 | 21 | 19 | 17 | 17 |
| Wind speed (mph) | 8.9 | 8.6 | 7.8 | 7.7 | 8.1 | 9.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 30 | 38 | 38 | 32 | 39 | 40 |
| Relative humidity (%) | 24 | 31 | 30 | 27 | 27 | 28 |
| Wind speed (mph) | 8.6 | 7.9 | 7.9 | 7.5 | 7.5 | 8.5 |
Methodology & sources
Temperature & precipitation — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.