Average annual temperature is 17.3 °C
Absolute maximum temperature: 40.4 °C
Absolute minimum temperature: -8.0 °C
Number of sunny days: 210 days
Number of rainy days: 154 days
Number of snow days: 1 day
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) | 20.8 | 22.9 | 26.7 | 28.4 | 32.7 | 39.4 | 39.8 | 40.4 | 36.4 | 30.7 | 28.0 | 21.2 |
| Average daytime temperature (°C) | 12.9 | 14.6 | 17.3 | 21.4 | 26.7 | 32.2 | 35.0 | 35.7 | 31.1 | 23.1 | 17.6 | 13.3 |
| Average temperature (°C) | 6.9 | 7.3 | 11.0 | 15.2 | 20.7 | 25.6 | 28.6 | 29.2 | 25.1 | 17.7 | 11.5 | 8.0 |
| Average night temperature (°C) | 2.5 | 2.7 | 6.5 | 10.3 | 15.8 | 20.3 | 23.7 | 24.0 | 20.4 | 13.4 | 7.0 | 4.3 |
| Absolute minimum temperature (°C) | -8.0 | -6.2 | -5.3 | 5.0 | 6.6 | 15.4 | 19.5 | 17.6 | 15.8 | -0.3 | -2.4 | -1.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 6.7 | 6.7 | 7.8 | 9.4 | 9.8 | 11.7 | 11.6 | 12.0 | 10.3 | 8.1 | 8.0 | 7.0 |
| Precipitation (mm) | 63 | 129 | 106 | 91 | 78 | 93 | 65 | 29 | 80 | 88 | 69 | 49 |
| Sunny days | 21 | 16 | 17 | 15 | 10 | 9 | 16 | 24 | 18 | 19 | 22 | 23 |
| Rainy days | 9 | 12 | 14 | 15 | 21 | 21 | 15 | 7 | 12 | 12 | 8 | 8 |
| Snow days | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The best time to visit Saint Louis during the most sunny months:
The largest precipitation sum in Saint Louis is at