| NWS Forecast for: St. Clair County Issued by: National Weather Service Saint Louis, MO Last Update: 629 PM CDT Mon Oct 19 2026 |  |
| Tonight: Partly cloudy. Lows in the mid 40s. East winds around 5 mph. Tuesday: Sunny. Highs in the lower 70s. East winds around 5 mph. Tuesday Night: Clear. Lows in the mid 40s. East winds around 5 mph. Wednesday: Sunny. Highs in the mid 70s. Light and variable winds. Wednesday Night: Clear. Lows in the mid 40s. Light and variable winds. Thursday Through Friday: Clear. Highs in the mid 70s. Lows in the upper 40s. Friday Night: Mostly clear. Lows in the upper 40s. Saturday And Saturday Night: Partly cloudy. Highs in the mid 70s. Lows in the lower 50s. Sunday: Partly sunny. Highs in the upper 70s. Sunday Night And Monday: Partly cloudy. Lows in the lower 50s. Highs in the mid 70s. | |
| Zone Forecast: St. Clair County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |