| NWS Forecast for: St. Clair County Issued by: National Weather Service Saint Louis, MO Last Update: 223 AM CDT Sun Oct 18 2026 | |
Rest Of Tonight: Clear. Patchy frost. Lows in the mid 30s. Southeast winds around 5 mph. Sunday: Areas of frost in the morning. Sunny. Not as cool with highs in the upper 60s. South winds 5 to 10 mph. Sunday Night: Clear. Lows around 40. Southeast winds around 5 mph in the evening, becoming light and variable. Monday: Sunny. Highs in the lower 70s. Light and variable winds, becoming southeast around 5 mph in the afternoon. Monday Night: Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 40s. Light and variable winds. Tuesday Through Thursday: Mostly clear. Highs in the upper 70s. Lows in the mid 40s. Thursday Night: Clear. Lows in the upper 40s. Friday And Friday Night: Mostly clear. Highs around 80. Lows in the upper 40s. Saturday: Mostly sunny. Highs around 80. | |
| Zone Forecast: St. Clair County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |