| National Weather Service Forecast for:
St. Charles County Issued by: NWS National Weather Service Saint Louis, MO |
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| Updated: 944 PM CST Thu Jan 15 2026 | ||||||||||||||||||
| St. Charles , MO | ||||||||||||||||||
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| Tonight |
Mostly cloudy. A chance of snow this evening. Not as cool with lows in the upper 20s. Temperature rising into the lower 30s after midnight. South winds 5 to 10 mph with gusts up to 25 mph. Chance of snow 50 percent. |
| Friday |
Partly sunny in the morning, then mostly cloudy with a slight chance of rain and snow in the afternoon. Not as cool with highs in the mid 40s. West winds 15 to 20 mph with gusts up to 30 mph. Chance of precipitation 20 percent. |
| Friday Night |
Mostly cloudy. A chance of snow, mainly in the evening. Lows in the lower 20s. West winds 10 to 15 mph with gusts up to 25 mph. Chance of snow 50 percent. |
| Saturday |
Mostly cloudy in the morning, then becoming partly sunny. Much cooler with highs in the mid 20s. West winds 10 to 15 mph with gusts up to 25 mph. |
| Saturday Night |
Partly cloudy in the evening, then clearing. Cooler with lows around 11. Northwest winds 5 to 10 mph. Wind chill values as low as 2 above. |
| Sunday |
Partly cloudy. Highs around 30. |
| Sunday Night |
Partly cloudy. Wind chill values as low as. |
| Monday |
Mostly clear. Highs in the lower 20s. |
| Tuesday |
Mostly clear. Highs in the mid 30s. |
| Tuesday Night |
Mostly clear. Wind chill values as low as 5. |
| Wednesday |
Partly cloudy. Highs in the mid 40s. |
| Wednesday Night |
Partly cloudy. Lows in the lower 20s. |
| Thursday |
Partly sunny. Highs in the lower 40s. |
| Zone Forecast |
St. Charles County |
Forecast from NOAA-NWS for St. Charles County. (Zone forecast)