| National Weather Service Forecast for:
St. Charles County Issued by: NWS National Weather Service Saint Louis, MO |
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| Updated: 253 PM CDT Tue Oct 6 2026 | ||||||||||||||||||
| St. Charles , MO | ||||||||||||||||||
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| Tonight |
Clear. Not as cool with lows in the mid 50s. South winds around 5 mph. |
| Wednesday |
Sunny. Highs in the upper 80s. West winds 5 to 10 mph. |
| Wednesday Night |
Mostly clear. Lows in the upper 50s. Northwest winds around 5 mph. |
| Thursday |
Sunny. Highs in the lower 80s. North winds around 5 mph. |
| Thursday Night |
Mostly clear. Lows in the mid 50s. Northeast winds around 5 mph. |
| Friday |
Clear. Highs in the mid 80s. |
| Friday Night |
Clear. Lows in the upper 50s. |
| Saturday |
Sunny. Highs in the upper 80s. |
| Saturday Night |
Partly cloudy. A 40 percent chance of showers. Lows around 60. |
| Sunday |
Partly cloudy. A 40 percent chance of showers. Highs around 80. |
| Monday Night |
Mostly clear in the evening, then becoming partly cloudy. Lows around 60. |
| Tuesday |
Sunny. A chance of showers, mainly in the morning. Highs in the lower 80s. Chance of rain 30 percent. |
| Zone Forecast |
St. Charles County |
Forecast from NOAA-NWS for St. Charles County. (Zone forecast)