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Saint-Louis, Senegal climate
BWh Hot desert
Saint-Louis has a remarkably steady tropical climate (Hot desert, Köppen BWh). The hottest month is October with an average daily high near 94°F, while the coldest is January averaging around 62°F at night. Precipitation totals about 12 inches a year and is strongly seasonal — September alone averages 4.5 inches while May barely receives 0.00 inches.
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)Saint-Louis climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 89 | 90 | 91 | 89 | 86 | 87 | 89 | 90 | 91 | 94 | 94 | 90 |
| Avg temp (°F) | 75 | 77 | 78 | 77 | 77 | 80 | 83 | 84 | 85 | 85 | 82 | 77 |
| Avg low (°F) | 62 | 64 | 65 | 66 | 68 | 73 | 77 | 78 | 78 | 76 | 70 | 64 |
| Precipitation (in) | 0.2 | 0.2 | 0.1 | 0.0 | 0.0 | 0.4 | 1.8 | 3.9 | 4.5 | 1.1 | 0.0 | 0.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 89 | 90 | 91 | 89 | 86 | 87 |
| Avg temp (°F) | 75 | 77 | 78 | 77 | 77 | 80 |
| Avg low (°F) | 62 | 64 | 65 | 66 | 68 | 73 |
| Precipitation (in) | 0.2 | 0.2 | 0.1 | 0.0 | 0.0 | 0.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 89 | 90 | 91 | 94 | 94 | 90 |
| Avg temp (°F) | 83 | 84 | 85 | 85 | 82 | 77 |
| Avg low (°F) | 77 | 78 | 78 | 76 | 70 | 64 |
| Precipitation (in) | 1.8 | 3.9 | 4.5 | 1.1 | 0.0 | 0.3 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 55 | 55 | 47 | 46 | 48 | 53 | 61 | 65 | 60 | 52 | 60 | 60 |
| Relative humidity (%) | 36 | 39 | 45 | 54 | 57 | 61 | 67 | 72 | 73 | 62 | 48 | 40 |
| Wind speed (mph) | 8.8 | 9.3 | 9.5 | 10.4 | 10.3 | 9.1 | 8.4 | 6.8 | 5.7 | 6.1 | 7.2 | 8.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 55 | 55 | 47 | 46 | 48 | 53 |
| Relative humidity (%) | 36 | 39 | 45 | 54 | 57 | 61 |
| Wind speed (mph) | 8.8 | 9.3 | 9.5 | 10.4 | 10.3 | 9.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 65 | 60 | 52 | 60 | 60 |
| Relative humidity (%) | 67 | 72 | 73 | 62 | 48 | 40 |
| Wind speed (mph) | 8.4 | 6.8 | 5.7 | 6.1 | 7.2 | 8.2 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Saint Louis Ousmane Masseck Ndiaye, a weather station, about 5 km from the city centre. The underlying daily records come from NOAA's global station network.
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.