Saint Louis Weather: September
 |
Average Day Temperature: | 93.1°F |
|
Average Night Temperature: | 85.0°F |
|
Sea Water Temperature: | 87.2°F |
|
Number of Sunny Days: | 18 days |
| Sunshine Hours: | 12.0 - 12.4 hours | |
|
Number of Rainy Days: | 5 days |
| Precipitation Totals: | 3.0 in | |
| detailed information | ||
forecast
| Saint Louis |
Temperature
| Saint Louis |
Air Temperature in September, °F
The highest day temperature in September 2025 was 91°F. The lowest night temperature was 83°F. The average values for day and night temperatures during September were 87.4°F и 85.1°F respectivly.
Saint Louis Water Sea Temperature in September, °F
The average sea surface temperature in September 2025 for Saint Louis was 88.2°F. The maximum and minimum values were 86.6°F and 90.4°F respectively.
Most of the days in September are sunny but you can also expect cloudy and gloomy days.
Precipitation Totals in September, in
Precipitation total in September for Saint Louis is 3.0 in. It makes september the most rainy month of the year.
The average wind speed in September is 11.1 mph. It makes September the most windless month of the year for Saint Louis.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Saint Louis in September is 9.0 hours.
Saint Louis on the Weather Map
| Cap Skirring |  |
+78 |
| Dakar |  |
+78 |
| Kaolack | |
+72 |
| Les Almadies | |
+78 |
| Saint Louis |  |
+72 |
| Ziguinchor | |
+74 |
| 0600 |  |
72°F | SW 14 mph |
| 0900 |  |
76°F | W 17 mph |
| 1200 | |
84°F | W 19 mph |
| 1500 | |
88°F | W 13 mph |
| 1800 | |
84°F | S 9 mph |
| 2100 |  |
78°F | S 15 mph |
| 0000 | |
80°F | S 16 mph |
| 0300 |  |
78°F | S 14 mph |