| NWS Forecast for: St. Clair County Issued by: National Weather Service Saint Louis, MO Last Update: 304 PM CDT Thu Jul 2 2026 |  |
Tonight: Partly cloudy with a slight chance of showers and thunderstorms this evening, then mostly clear after midnight. Lows in the mid 70s. South winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 104 early this evening. Friday: Sunny. A slight chance of showers and thunderstorms in the afternoon. Hot with highs in the mid 90s. South winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 107. Friday Night: Partly cloudy. A slight chance of showers and thunderstorms in the evening. Humid with lows in the mid 70s. South winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 105 early in the evening. Independence Day: Mostly 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 lower 90s. Southwest winds around 5 mph. Chance of rain 40 percent. Heat index values up to 106. Saturday Night: Partly cloudy with a chance of showers and thunderstorms. Humid with lows in the lower 70s. Southwest winds around 5 mph. Chance of rain 50 percent. Heat index values up to 103 early in the evening. Sunday: Mostly sunny. A chance of showers and thunderstorms, mainly in the morning. Highs in the lower 90s. Chance of rain 50 percent. Heat index values up to 105. Sunday Night: Partly cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. Lows in the lower 70s. Chance of rain 40 percent. Heat index values up to 100 early in the evening. Monday And Monday Night: Partly cloudy. A slight chance of showers and thunderstorms. Highs in the upper 80s. Lows around 70. Chance of rain 20 percent. Tuesday: Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 30 percent. Tuesday Night: Partly cloudy in the evening, then becoming mostly clear. A slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. Wednesday: Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs around 90. Chance of rain 30 percent. Wednesday Night: Mostly clear. A slight chance of showers and thunderstorms in the evening, then a chance of showers after midnight. Lows in the lower 70s. Chance of rain 30 percent. Thursday: Mostly sunny. A slight chance of showers in the morning, then a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 100. | |
| Zone Forecast: St. Clair County | |
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