| NWS Forecast for: St. Clair County Issued by: National Weather Service Saint Louis, MO Last Update: 127 AM CDT Sun Jul 26 2026 | |
Rest Of Tonight: Mostly cloudy. Near steady temperature in the mid 70s. Light and variable winds. Sunday: Mostly cloudy with a slight chance of showers and thunderstorms in the morning, then mostly sunny in the afternoon. Hot with highs in the mid 90s. Southwest winds around 5 mph. Chance of rain 20 percent. Heat index values up to 117. Sunday Night: Partly cloudy. Humid with lows in the upper 70s. South winds around 5 mph. Heat index values up to 116 early in the evening. Monday: Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 114. Monday Night: Mostly clear. Humid with lows in the upper 70s. Southwest winds 5 to 10 mph. Heat index values up to 112 early in the evening. Tuesday And Tuesday Night: Partly cloudy. Highs in the lower 90s. Lows in the lower 70s. Heat index values up to 105. Wednesday Through Thursday: Mostly clear. Highs in the upper 80s. Lows in the upper 60s. Thursday Night: Partly cloudy in the evening, then mostly cloudy with a slight chance of showers after midnight. Lows in the upper 60s. Chance of rain 20 percent. Friday: Partly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 20 percent. Friday Night: A slight chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows in the upper 60s. Chance of rain 40 percent. Saturday: Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 20 percent. | |
| Zone Forecast: St. Clair County | |
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