Saint-Louis monthly weather averages
Average daytime temperature
The bar chart below shows the average monthly peak daytime temperatures at Saint-Louis
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 29.9 | 31.6 | 32.4 | 31.9 | 30.9 | 31.1 | 30.9 | 31.6 | 32.4 | 33.7 | 33 | 30.5 |
| °F | 85.9 | 88.9 | 90.4 | 89.4 | 87.7 | 88 | 87.7 | 88.9 | 90.3 | 92.7 | 91.4 | 86.9 |
Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.
Average rainfall & rainy days
The graph below shows the average rainfall and number of rainy days per month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | 2 | 1 | 0 | 0 | 0 | 7 | 46 | 95 | 95 | 27 | 1 | 1 |
| inches | 0.1 | 0 | 0 | 0 | 0 | 0.3 | 1.8 | 3.7 | 3.7 | 1.1 | 0 | 0 |
| Rainy days | 1 | 1 | 0 | 0 | 0 | 1 | 4 | 6 | 6 | 1 | 0 | 1 |
Average annual rainfall in Saint-Louis: 274.866mm (108.2 inches)
Average daily sunshine
The bar chart below shows the average daily sunshine hours in Saint-Louis
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Hrs sunshine | 8.3 | 9 | 9.4 | 10 | 9.6 | 7.9 | 8.4 | 8.4 | 8 | 8.9 | 8.7 | 8 |
Day / night temperatures
The graph below shows the daily range of temperatures for each month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min °C | 15.3 | 16.4 | 17.4 | 18 | 19.4 | 22.3 | 24.1 | 24.8 | 24.9 | 23.3 | 19.5 | 16.4 |
| Max °C | 30.3 | 32 | 32.8 | 32.2 | 31.2 | 31.3 | 31.1 | 31.8 | 32.6 | 34 | 33.4 | 30.9 |
| Min °F | 59.5 | 61.5 | 63.3 | 64.4 | 66.9 | 72.1 | 75.4 | 76.6 | 76.7 | 73.9 | 67 | 61.4 |
| Max °F | 73 | 75.6 | 77.2 | 77.2 | 77.5 | 80.2 | 81.7 | 82.9 | 83.7 | 83.5 | 79.5 | 74.5 |
Sea temperature
The graph below shows the average sea temperature.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 20.5 | 19.5 | 19.5 | 19.8 | 20.9 | 23.8 | 26.5 | 27.8 | 28.4 | 27.9 | 25.9 | 23.2 |
| °F | 68.8 | 67 | 67.1 | 67.6 | 69.6 | 74.8 | 79.7 | 82.1 | 83.1 | 82.2 | 78.6 | 73.7 |
Wind speed
The graph below shows the average wind speed.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| km/h | 11 | 11 | 11 | 12 | 11 | 10 | 10 | 8 | 8 | 8 | 9 | 10 |
| mph | 7 | 7 | 7 | 7 | 7 | 6 | 7 | 5 | 5 | 5 | 5 | 6 |
A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.
Relative humidity
The graph below shows the average relative humidity.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 41% | 42% | 44% | 49% | 56% | 65% | 71% | 76% | 76% | 64% | 50% | 43% |
Other monthly averages
Saint-Louis weather stats
| Hottest month: | September | 32.4°C 90.3°F |
|---|---|---|
| Driest month: | April | 0mm 0ins |
| Sunniest month: | April | 10hrs |
| Coldest month: | January | 29.9°C 85.8°F |
| Wettest month: | September | 95mm 3.7ins |
| Warmest sea: | September | 28.4°C 83.1°F |
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