| National Weather Service Forecast for:
St. Charles County Issued by: NWS National Weather Service Saint Louis, MO |
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| Updated: 318 AM CST Wed Dec 3 2025 | ||||||||||||||||||
| St. Charles , MO | ||||||||||||||||||
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| Today |
Partly sunny this morning, then mostly cloudy with a chance of rain and snow this afternoon. Not as cool with highs in the upper 30s. South winds 5 to 10 mph, becoming southwest this afternoon. Chance of precipitation 50 percent. |
| Tonight |
Cloudy. Snow likely, mainly in the evening. Little or no snow accumulation. Lows around 13. North winds 10 to 15 mph. Chance of snow 60 percent. Wind chill values as low as 3 above after midnight. |
| Thursday |
Mostly sunny. Much cooler with highs in the lower 20s. North winds 5 to 10 mph. Wind chill values as low as zero in the morning. |
| Thursday Night |
Partly cloudy. Lows around 11. East winds around 5 mph, becoming south after midnight. |
| Friday |
Mostly sunny. Not as cool with highs in the upper 30s. South winds around 5 mph. |
| Friday Night |
Mostly cloudy. Lows in the mid 20s. |
| Saturday |
Mostly cloudy. Highs in the upper 30s. |
| Saturday Night |
Mostly cloudy. Lows in the mid 20s. |
| Sunday |
Mostly cloudy. A slight chance of rain and snow in the afternoon. Highs in the mid 30s. Chance of precipitation 20 percent. |
| Sunday Night |
Mostly cloudy. Lows in the mid 20s. |
| Monday |
Mostly cloudy. Highs in the mid 30s. |
| Monday Night |
Mostly cloudy. Lows in the mid 20s. |
| Tuesday |
Mostly sunny. Highs in the mid 40s. |
| Zone Forecast |
St. Charles County |
Forecast from NOAA-NWS for St. Charles County. (Zone forecast)