| NWS Forecast for: St. Charles County Issued by: National Weather Service Saint Louis, MO Last Update: 639 PM CDT Sat Jul 12 2025 |  |
Tonight: Partly cloudy. Lows in the lower 70s. Northwest winds around 5 mph. Sunday: Partly sunny with a slight chance of showers and thunderstorms in the morning, then mostly cloudy with a chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Temperature falling into the lower 80s in the afternoon. East winds around 5 mph, becoming south in the afternoon. Chance of rain 50 percent. Sunday Night: Mostly cloudy. A slight chance of showers and thunderstorms in the evening. Patchy fog after midnight. Lows around 70. Southwest winds around 5 mph in the evening, becoming light and variable. Chance of rain 20 percent. Monday: Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Southeast winds around 5 mph. Chance of rain 20 percent. Monday Night: Partly cloudy in the evening, then becoming mostly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 70s. Southeast winds around 5 mph. Chance of rain 20 percent. Tuesday: Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 50 percent. Tuesday Night: Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. Wednesday And Wednesday Night: Partly cloudy. A chance of showers and thunderstorms. Highs in the lower 90s. Lows in the lower 70s. Chance of rain 50 percent. Heat index values up to 100. Thursday: Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 40 percent. Heat index values up to 100. Thursday Night: Mostly cloudy. A chance of showers and thunderstorms in the evening. Lows in the lower 70s. Chance of rain 40 percent. Friday: Partly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 20 percent. Friday Night And Saturday: Partly cloudy. A slight chance of showers and thunderstorms. Lows around 70. Highs in the upper 80s. Chance of rain 20 percent. | |
| Zone Forecast: St. Charles County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |