| NWS Forecast for: St. Charles County Issued by: National Weather Service Saint Louis, MO Last Update: 1109 AM CST Sun Jan 11 2026 | |
| This Afternoon: Sunny. Highs in the upper 30s. Northwest winds 5 to 10 mph with gusts up to 20 mph. Tonight: Clear. Lows in the mid 20s. Southwest winds 5 to 10 mph. Monday: Sunny. Not as cool with highs in the lower 50s. Southwest winds 5 to 10 mph. Monday Night: Mostly clear in the evening, then becoming partly cloudy. Not as cool with lows in the mid 30s. Southwest winds 5 to 10 mph. Tuesday: Partly sunny. Highs in the upper 50s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Tuesday Night: Mostly cloudy. A slight chance of rain after midnight. Lows in the upper 30s. Chance of rain 20 percent. Wednesday: Partly sunny in the morning, then becoming mostly cloudy. Much cooler with highs in the lower 40s. Temperature falling into the mid 30s in the afternoon. Wednesday Night And Thursday: Partly cloudy. Lows around 20. Highs in the upper 30s. Thursday Night And Friday: Mostly cloudy. Lows in the upper 20s. Highs in the lower 40s. Friday Night And Saturday: Mostly cloudy. Lows in the lower 20s. Highs in the lower 30s. | |
| Zone Forecast: St. Charles County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |