| National Weather Service Forecast for:
St. Charles County Issued by: NWS National Weather Service Saint Louis, MO |
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| Updated: 444 PM CDT Wed Oct 28 2026 | ||||||||||||||||||
| St. Charles , MO | ||||||||||||||||||
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| Tonight |
Clear. Lows in the mid 50s. South winds 5 to 10 mph. |
| Thursday |
Sunny. Highs in the lower 80s. Southwest winds around 5 mph. |
| Thursday Night |
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 50s. Northeast winds around 5 mph. |
| Friday |
Partly sunny. Highs in the upper 70s. Southeast winds around 5 mph. |
| Friday Night |
Mostly cloudy. Lows in the upper 50s. Southeast winds around 5 mph. |
| Saturday |
Mostly cloudy. Highs in the mid 70s. |
| Saturday Night |
Mostly cloudy with a 20 percent chance of showers. Lows in the mid 50s. |
| Sunday |
Mostly cloudy. A chance of showers, mainly in the morning. Highs in the lower 70s. Chance of rain 30 percent. |
| Sunday Night |
Mostly cloudy with a 20 percent chance of showers. Lows in the mid 50s. |
| Monday |
Mostly cloudy with a 40 percent chance of showers. Highs in the lower 70s. |
| Monday Night |
Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the upper 50s. Highs in the lower 70s.. |
| Tuesday |
Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the upper 50s. Highs in the lower 70s.. |
| Tuesday Night |
Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the upper 50s. Highs in the lower 70s.. |
| Wednesday |
Mostly cloudy. Showers likely, mainly in the morning. Highs around 70. Chance of rain 60 percent. |
| Zone Forecast |
St. Charles County |
Forecast from NOAA-NWS for St. Charles County. (Zone forecast)