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City of St. Charles, ILSt. Charles, IL 7-Day Weather Forecast
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St. Charles Weather Forecast
St. Charles, IL Weather Forecast Date: 829 PM CST Mon Mar 02 2026
Weather forecast for St. Charles, IL
Tonight Lo: 30°F Lo: -1°C |
Tonight... Mostly cloudy. A slight chance of rain and freezing rain late. Near steady temperature in the lower 30s. East winds around 5 mph. Chance of precipitation 20%. |
| Tue Hi: 45°FHi: 7°C Lo: 31°F Lo: -1°C |
Tuesday... Mostly cloudy. A chance of freezing rain early in the morning. A chance of rain in the morning, then a slight chance of rain in the afternoon. Ice accumulation around a trace. Highs in the mid 40s. East winds around 5 mph. Chance of precipitation 40%. |
Wed Hi: 51°FHi: 11°C Lo: 40°F Lo: 4°C |
Wednesday... Mostly cloudy. A chance of rain showers. Highs in the lower 50s. East winds 5 to 10 mph. Chance of precipitation 40%. |
Thu Hi: 55°FHi: 13°C Lo: 41°F Lo: 5°C |
Thursday... Showers. Highs in the mid 50s. Chance of precipitation 80%. |
Fri Hi: 65°FHi: 18°C Lo: 51°F Lo: 11°C |
Friday... Showers likely. A slight chance of thunderstorms in the afternoon. Highs in the mid 60s. Chance of precipitation 70%. |
| Sat Hi: 65°FHi: 18°C Lo: 39°F Lo: 4°C |
Saturday... Mostly cloudy. A chance of showers in the morning. Highs in the mid 60s. Temperature falling into the upper 50s in the afternoon. Chance of precipitation 50%. |
Sun Hi: 60°FHi: 16°C Lo: 41°F Lo: 5°C |
Sunday... Partly cloudy. Highs around 60. |
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