| NWS Forecast for: St. Clair County Issued by: National Weather Service Saint Louis, MO Last Update: 424 PM CDT Tue Jul 15 2025 |  |
Tonight: Mostly cloudy with a chance of showers and thunderstorms this evening, then partly cloudy after midnight. Lows in the lower 70s. South winds around 5 mph. Chance of rain 40 percent. Wednesday: Mostly sunny. A slight chance of showers in the morning, then a chance of showers and thunderstorms in the afternoon. Humid with highs in the mid 90s. Southwest winds 5 to 10 mph. Chance of rain 30 percent. Heat index values up to 106. Wednesday Night: Partly cloudy with a slight chance of showers and thunderstorms. Humid with lows in the mid 70s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 102 early in the evening. Thursday: Partly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Humid with highs in the upper 80s. West winds 5 to 10 mph. Chance of rain 50 percent. Thursday Night: Mostly cloudy with a chance of showers and thunderstorms. Lows in the lower 70s. North winds around 5 mph. Chance of rain 50 percent. Friday: Mostly cloudy with a chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 50 percent. Friday Night: Mostly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. Saturday: Partly sunny with a chance of showers and thunderstorms. Highs around 90. Chance of rain 40 percent. Heat index values up to 100. Saturday Night And Sunday: Partly cloudy. A chance of showers and thunderstorms. Lows in the mid 70s. Highs in the lower 90s. Chance of rain 40 percent. Heat index values up to 105. Sunday Night: Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 40 percent. Heat index values up to 100 early in the evening. Monday: Mostly sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 100. Monday Night: Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 20 percent. Heat index values up to 100 early in the evening. Tuesday: Sunny, hot with highs in the mid 90s. Heat index values up to 105. | |
| Zone Forecast: St. Clair County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |