| National Weather Service Forecast for:
St. Charles County Issued by: NWS National Weather Service Saint Louis, MO |
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| Updated: 303 AM CST Fri Jan 2 2026 | ||||||||||||||||||
| St. Charles , MO | ||||||||||||||||||
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| Today |
Cloudy. Highs in the mid 30s. Northeast winds 5 to 10 mph. |
| Tonight |
Mostly cloudy. Lows in the upper 20s. Northeast winds around 5 mph. |
| Saturday |
Partly sunny in the morning, then clearing. Highs around 40. North winds around 5 mph. |
| Saturday Night |
Mostly clear. Lows in the mid 20s. Northwest winds around 5 mph in the evening, becoming light and variable. |
| Sunday |
Mostly sunny in the morning, then becoming mostly cloudy. Highs in the lower 40s. Northeast winds around 5 mph, becoming southeast in the afternoon. |
| Sunday Night |
Mostly clear. Lows in the lower 30s. |
| Monday |
Mostly clear. Highs in the upper 50s. |
| Monday Night |
Partly cloudy. Lows in the lower 40s. Highs in the lower 60s.. |
| Tuesday |
Partly cloudy. Lows in the lower 40s. Highs in the lower 60s.. |
| Tuesday Night |
Mostly cloudy. Lows in the upper 30s. |
| Wednesday |
Mostly cloudy. Highs in the upper 50s. |
| Wednesday Night |
Mostly cloudy. A slight chance of rain after midnight. Lows in the lower 40s. Chance of rain 20 percent. |
| Thursday |
Mostly cloudy with a 40 percent chance of rain. Highs around 60. |
| Zone Forecast |
St. Charles County |
Forecast from NOAA-NWS for St. Charles County. (Zone forecast)