| National Weather Service Forecast for:
St. Charles County Issued by: NWS National Weather Service Saint Louis, MO |
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| Updated: 439 PM CDT Tue Jul 1 2025 | ||||||||||||||||||
| St. Charles , MO | ||||||||||||||||||
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| Tonight |
Mostly clear. Lows in the mid 60s. Northwest winds 5 to 10 mph this evening, becoming light and variable. |
| Wednesday |
Sunny. Highs in the upper 80s. Northwest winds around 5 mph. |
| Wednesday Night |
Mostly clear. Lows in the upper 60s. West winds around 5 mph in the evening, becoming light and variable. |
| Thursday |
Sunny. Highs in the lower 90s. Southwest winds around 5 mph. |
| Thursday Night |
Mostly clear. Lows in the lower 70s. South winds around 5 mph. |
| Independence Day |
Sunny. Highs in the lower 90s. |
| Friday Night |
Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 70s. |
| Saturday |
Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100. |
| Saturday Night |
Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Lows in the mid 70s. Chance of rain 40 percent. |
| Sunday |
Mostly cloudy. A chance of showers and thunderstorms. Highs in the lower 90s. |
| Sunday Night |
Mostly cloudy. A chance of showers and thunderstorms. Lows in the lower 70s. |
| Monday |
Mostly cloudy with a chance of showers and thunderstorms. Highs in the upper 80s. |
| Monday Night |
Mostly cloudy with a chance of showers and thunderstorms. Lows around 70. |
| Tuesday |
Mostly cloudy with a chance of showers and thunderstorms. Highs in the upper 80s. |
| Zone Forecast |
St. Charles County |
Forecast from NOAA-NWS for St. Charles County. (Zone forecast)