| National Weather Service Forecast for:
St. Charles County Issued by: NWS National Weather Service Saint Louis, MO |
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| Updated: 928 PM CST Sun Feb 8 2026 | ||||||||||||||||||
| St. Charles , MO | ||||||||||||||||||
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| Tonight |
Mostly clear. Lows in the upper 20s. East winds 5 to 10 mph. |
| Monday |
Sunny. Highs in the mid 50s. Southeast winds around 5 mph, becoming south in the afternoon. |
| Monday Night |
Mostly clear. Not as cool with lows in the lower 40s. South winds 5 to 10 mph, becoming southwest after midnight. |
| Tuesday |
Sunny. Highs around 60. Northwest winds 5 to 10 mph. |
| Tuesday Night |
Mostly cloudy. A slight chance of rain in the evening. Lows in the lower 30s. North winds around 5 mph. Chance of rain 20 percent. |
| Wednesday |
Mostly sunny. Cooler with highs around 50. |
| Wednesday Night |
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the lower 30s. |
| Thursday |
Mostly cloudy. A slight chance of rain in the morning, then a chance of rain and snow in the afternoon. Highs in the mid 40s. Chance of precipitation 30 percent. |
| Thursday Night |
Mostly cloudy. A chance of rain, mainly in the evening. Lows in the lower 30s. Chance of rain 40 percent. |
| Friday |
Mostly cloudy in the morning, then becoming partly sunny. A 20 percent chance of rain. Highs in the mid 40s. |
| Friday Night |
Partly cloudy with a 40 percent chance of rain. Lows in the lower 30s. |
| Saturday |
Partly sunny in the morning, then becoming mostly cloudy. A 50 percent chance of rain. Highs in the mid 40s. |
| Saturday Night |
Mostly cloudy with a 40 percent chance of rain. Lows in the lower 30s. |
| Sunday |
A slight chance of snow in the morning. Sunny with a slight chance of rain. Highs around 50. Chance of precipitation 20 percent. |
| Zone Forecast |
St. Charles County |
Forecast from NOAA-NWS for St. Charles County. (Zone forecast)