Saint Charles Weather Forecast
- 38
- 57
Becoming Sunny
- 41
- 73
Mostly Sunny
- 31
- 64
Partly Sunny
- 27
- 40
Rain/Snow Likely
- 26
- 41
Chance Freezing Rain
- 31
- 44
Chance Rain
Today 26 Feb St. Charles
Sunny. Highs in the mid 50s. East Winds 5 to 10 Mph, becoming south this afternoon.
Tonight 26 Feb St. Charles
Clear. Lows in the mid 30s. South Winds around 5 Mph.
Saint Charles Temperature Statistics
February Temperature
St. Louis Lambert International Airport (6.2 miles)
Lowest 1 February, 2026
4.6 °FAverage February
39.9 °FHighest 18 February, 2026
73.7 °F
Climate (2021–Present)
St. Louis Lambert International Airport (6.2 miles)
Average Low 2021–2026
50.5 °FAverage 2021–2026
60 °FAverage High 2021–2026
69.4 °F