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Saint-Louis climate by month
What the weather is like
Saint-Louis has a hot desert climate (Köppen BWh): very little rain and intense sun.
The warmest month is October, when afternoons average 30° and nights 26°. January is the coolest month, with highs of 25° and lows of 18°. The difference between the warmest and the coolest month is about 6°, a small seasonal swing typical of places tempered by the sea.
About 261 mm of precipitation falls in an average year. August is the wettest month (102 mm, 20 wet days) and January the driest (3 mm, 0 wet days). Cloud cover ranges from 13% in May to 36% in August.
The sea reaches about 28° in September. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Compared with Dakar, the capital, Saint-Louis is 1.8° warmer on a October afternoon and receives less precipitation over the year.
Year in figures
- Hottest afternoons
- 30° · October
- Coldest nights
- 18° · January
- Wettest month
- August
- Driest month
- January
- Clearest skies
- May · 13% cloud
- Warmest sea
- 28° · September
- Longest day
- 13 h 04 min
- Shortest day
- 11 h 11 min
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columns, sea temperature lineTemperature curve
Average high, low and seaDaylight
Hours between sunrise and sunset on the 15th of each monthClimate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 25° | 25° | 25° | 25° | 26° | 27° | 28° | 29° | 30° | 30° | 29° | 27° |
| Average low | 18° | 19° | 20° | 20° | 21° | 23° | 25° | 26° | 26° | 26° | 24° | 21° |
| Precipitation | 3 mm | 1 mm | 0 mm | 0 mm | 0 mm | 4 mm | 40 mm | 102 mm | 94 mm | 16 mm | 0 mm | 1 mm |
| Wet days (≥1 mm) | 0 | 0.7 | 1.2 | 0.5 | 0 | 2.3 | 8.5 | 20.3 | 18.3 | 6.2 | 0.3 | 0.7 |
| Cloud cover | 28% | 27% | 18% | 15% | 13% | 15% | 25% | 36% | 34% | 24% | 33% | 33% |
| Sea temperature | 20° | 19° | 19° | 19° | 21° | 24° | 26° | 28° | 28° | 28° | 25° | 22° |
| Daylight | 11h 16 | 11h 37 | 12h 02 | 12h 30 | 12h 52 | 13h 04 | 13h 00 | 12h 40 | 12h 14 | 11h 47 | 11h 23 | 11h 11 |
| Month score | 100 | 98 | 95 | 98 | 97 | 86 | 67 | 48 | 46 | 64 | 80 | 90 |