inland destination · city of 33,379 · warmest in Jul · mid-range
Open St. Charles on the live value map →| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | 1 | 3 | 7 | 13 | 18 | 22 | 25 | 24 | 20 | 14 | 9 | 4 |
| High °C | 6 | 8 | 13 | 19 | 24 | 28 | 31 | 30 | 26 | 20 | 14 | 9 |
| Low °C | -4 | -3 | 1 | 6 | 11 | 17 | 19 | 19 | 15 | 8 | 3 | -1 |
| Rain (days) | 82 | 73 | 92 | 81 | 99 | 92 | 99 | 105 | 93 | 83 | 85 | 82 |
Warmest month: Jul. Driest: Feb.