Average annual temperature is 10.0 °C
Absolute maximum temperature: 34.5 °C
Absolute minimum temperature: -23.0 °C
Number of sunny days: 165 days
Number of rainy days: 166 days
Number of snow days: 34 days
Look at detailed online map of Saint Louis
* Weather data for Saint Louis United States is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 6.9 | 11.7 | 13.4 | 26.6 | 33.0 | 34.5 | 33.3 | 31.8 | 31.5 | 29.2 | 16.2 | 13.6 |
| Average daytime temperature (°C) | 2.1 | 3.2 | 5.8 | 15.1 | 22.2 | 27.6 | 27.5 | 25.2 | 22.7 | 15.9 | 8.1 | 6.0 |
| Average temperature (°C) | -1.0 | -1.9 | 0.8 | 8.7 | 14.8 | 20.5 | 21.8 | 19.6 | 17.6 | 11.5 | 3.5 | 2.9 |
| Average night temperature (°C) | -3.6 | -5.9 | -3.3 | 3.1 | 7.9 | 13.9 | 16.5 | 14.9 | 13.1 | 8.2 | 0.0 | 0.8 |
| Absolute minimum temperature (°C) | -23.0 | -17.1 | -8.6 | -5.8 | 1.3 | 8.0 | 11.2 | 8.1 | 6.5 | -2.3 | -8.1 | -5.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 15.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 9.4 | 10.5 | 11.9 | 13.4 | 14.7 | 15.4 | 15.0 | 13.9 | 12.5 | 11.0 | 9.7 | 9.0 |
| Daylight minimum duration (h) | 9.0 | 9.0 | 11.0 | 12.0 | 14.0 | 15.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 8.0 |
| Sunshine mean duration (h) | 2.8 | 6.2 | 6.6 | 8.8 | 10.5 | 12.1 | 12.1 | 10.6 | 8.2 | 6.0 | 6.1 | 3.5 |
| Precipitation (mm) | 55 | 92 | 73 | 80 | 27 | 56 | 124 | 204 | 31 | 82 | 45 | 47 |
| Sunny days | 8 | 13 | 11 | 14 | 22 | 17 | 7 | 15 | 14 | 11 | 18 | 15 |
| Rainy days | 12 | 8 | 10 | 16 | 9 | 13 | 24 | 16 | 16 | 20 | 7 | 15 |
| Snow days | 11 | 7 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5 | 1 |
The best time to visit Saint Louis during the most sunny months:
Months with the longest average daylight duration in Saint Louis:
The largest precipitation sum in Saint Louis is at