| National Weather Service Forecast for:
St. Charles County Issued by: NWS National Weather Service Saint Louis, MO |
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| Updated: 1034 PM CST Thu Jan 8 2026 | ||||||||||||||||||
| St. Charles , MO | ||||||||||||||||||
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| Overnight |
Partly cloudy. A chance of showers with a slight chance of thunderstorms late this evening. Lows in the mid 40s. Southwest winds 15 to 20 mph with gusts up to 35 mph. Chance of rain 50 percent. |
| Friday |
Mostly cloudy. Cooler with highs in the lower 50s. Northwest winds 10 to 15 mph. Gusts up to 30 mph in the morning. |
| Friday Night |
Mostly cloudy. Rain likely after midnight. Lows in the upper 30s. North winds around 5 mph. Chance of rain 60 percent. |
| Saturday |
Partly sunny with a slight chance of rain in the morning, then sunny in the afternoon. Highs in the mid 40s. Northwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent. |
| Saturday Night |
Partly cloudy in the evening, then clearing. Cooler with lows in the mid 20s. Northwest winds 10 to 15 mph with gusts up to 25 mph. |
| Sunday |
Mostly clear. Highs in the mid 30s. |
| Sunday Night |
Mostly clear. Lows in the mid 20s. |
| Monday |
Sunny. Not as cool with highs in the lower 50s. |
| Monday Night |
Mostly clear in the evening, then becoming partly cloudy. Not as cool with lows in the mid 30s. |
| Tuesday |
Mostly sunny in the morning, then becoming mostly cloudy. Highs in the mid 50s. |
| Tuesday Night |
Mostly cloudy. A slight chance of rain in the evening. Lows in the mid 30s. Chance of rain 20 percent. |
| Wednesday |
Mostly cloudy. Highs in the lower 40s. |
| Wednesday Night |
Mostly cloudy. Lows in the mid 20s. |
| Thursday |
Mostly sunny. Highs in the upper 30s. |
| Zone Forecast |
St. Charles County |
Forecast from NOAA-NWS for St. Charles County. (Zone forecast)