| National Weather Service Forecast for:
St. Charles County Issued by: NWS National Weather Service Saint Louis, MO |
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| Updated: 1108 AM CDT Sat Apr 25 2026 | ||||||||||||||||||
| St. Charles , MO | ||||||||||||||||||
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| This Afternoon |
Sunny. Highs in the upper 70s. East winds around 5 mph. |
| Tonight |
Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 50s. East winds around 5 mph. |
| Sunday |
Mostly sunny. Highs in the upper 70s. Southeast winds 5 to 10 mph. |
| Sunday Night |
Mostly cloudy. A chance of showers and thunderstorms after midnight. Lows in the lower 60s. Southeast winds 10 to 15 mph. Chance of rain 50 percent. |
| Monday |
Partly sunny. A chance of showers with a slight chance of thunderstorms in the morning, then showers with thunderstorms likely in the afternoon. Highs in the lower 80s. South winds 15 to 20 mph with gusts up to 35 mph. Chance of rain 90 percent. |
| Monday Night |
Showers likely with a chance of thunderstorms in the evening, then mostly clear with a slight chance of showers after midnight. Lows in the lower 50s. Chance of rain 70 percent. |
| Tuesday |
Sunny. A chance of showers with a slight chance of thunderstorms in the afternoon. Cooler with highs in the lower 70s. Chance of rain 30 percent. |
| Tuesday Night |
Partly cloudy. A chance of showers and thunderstorms in the evening, then a slight chance of showers after midnight. Lows around 50. Chance of rain 40 percent. |
| Wednesday |
Mostly clear. Highs in the upper 60s. |
| Wednesday Night |
Mostly clear. Lows in the mid 40s. |
| Thursday |
Mostly sunny with a 20 percent chance of showers. Highs in the upper 60s. |
| Thursday Night |
Mostly cloudy. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the upper 40s. Chance of rain 30 percent. |
| Friday |
Partly sunny with a 20 percent chance of showers. Highs in the lower 60s. |
| Zone Forecast |
St. Charles County |
Forecast from NOAA-NWS for St. Charles County. (Zone forecast)