| National Weather Service Forecast for:
St. Charles County Issued by: NWS National Weather Service Saint Louis, MO |
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| Updated: 423 AM CST Wed Dec 10 2025 | ||||||||||||||||||
| St. Charles , MO | ||||||||||||||||||
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| Today |
Mostly cloudy. A chance of sprinkles this morning. Breezy, cooler with highs in the lower 40s. Northwest winds 15 to 25 mph. Gusts up to 45 mph this morning. |
| Tonight |
Mostly cloudy. Cooler with lows in the mid 20s. Northwest winds 5 to 10 mph. |
| Thursday |
Partly sunny in the morning, then becoming mostly cloudy. Highs in the upper 30s. West winds around 5 mph, becoming south in the afternoon. |
| Thursday Night |
Mostly cloudy. A slight chance of snow in the evening. Near steady temperature in the mid 30s. South winds 5 to 10 mph, becoming southwest after midnight. Chance of snow 20 percent. |
| Friday |
Partly sunny. Highs in the lower 40s. Northwest winds 10 to 15 mph. |
| Friday Night |
Mostly cloudy. Cooler with lows around 20. |
| Saturday |
Mostly cloudy in the morning, then partly sunny with a slight chance of snow in the afternoon. Highs in the lower 30s. Chance of snow 20 percent. |
| Saturday Night |
Mostly cloudy in the evening, then becoming partly cloudy. Cooler with lows around 10 above. Wind chill values as low as 5 below after midnight. |
| Sunday |
Mostly clear. Highs in the lower 20s. |
| Sunday Night |
Mostly clear. Wind chill values as low as -5. |
| Monday |
Mostly sunny. Not as cool with highs in the upper 30s. |
| Monday Night |
Mostly cloudy. A slight chance of rain in the evening. Not as cool with lows in the upper 20s. Chance of rain 20 percent. |
| Tuesday |
Mostly cloudy. Highs in the mid 40s. |
| Zone Forecast |
St. Charles County |
Forecast from NOAA-NWS for St. Charles County. (Zone forecast)