| National Weather Service Forecast for:
St. Charles County Issued by: NWS National Weather Service Saint Louis, MO |
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| Updated: 759 PM CST Wed Jan 14 2026 | ||||||||||||||||||
| St. Charles , MO | ||||||||||||||||||
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| Tonight |
Clear. Much cooler with lows around 17. Northwest winds 10 to 15 mph. Gusts up to 30 mph this evening. |
| Thursday |
Sunny. Highs in the mid 30s. Northwest winds 5 to 10 mph, becoming southwest in the afternoon. |
| Thursday Night |
Mostly cloudy. A chance of snow in the evening. Not as cool. Near steady temperature in the lower 30s. Temperature rising into the lower 30s after midnight. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of snow 50 percent. |
| Friday |
Partly sunny in the morning, then becoming mostly cloudy. Highs in the mid 40s. West winds 15 to 20 mph with gusts up to 30 mph. |
| Friday Night |
Mostly cloudy with a 20 percent chance of snow showers. Lows around 20. West winds 10 to 15 mph with gusts up to 25 mph. |
| Saturday |
Partly sunny. Much cooler with highs in the mid 20s. |
| Saturday Night |
Partly cloudy. Lows around 10 above. Wind chill values as low as -5. |
| Sunday |
Partly cloudy. Lows around 10 above. Highs in the mid 20s. |
| Monday Night |
Mostly clear. Lows around 10 above. Wind chill values as low as. |
| Tuesday |
Mostly clear. Lows around 10 above. Highs in the lower 30s. |
| Tuesday Night |
Mostly clear. Not as cool with lows around 20. |
| Wednesday |
Mostly sunny. Highs in the lower 40s. |
| Zone Forecast |
St. Charles County |
Forecast from NOAA-NWS for St. Charles County. (Zone forecast)