| NWS Forecast for: St. Clair County Issued by: National Weather Service Saint Louis, MO Last Update: 1153 AM CDT Sat Oct 17 2026 | |
This Afternoon: Sunny. Highs around 60. Northeast winds around 5 mph. Tonight: Clear. Patchy frost after midnight. Lows in the mid 30s. Light and variable winds, becoming southeast around 5 mph after midnight. Sunday: Areas of frost in the morning. Sunny. Highs in the upper 60s. South winds 5 to 10 mph. Sunday Night: Clear. Lows in the upper 30s. 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 Through Wednesday Night: Mostly clear. Lows in the mid 40s. Highs in the upper 70s. Thursday Through Friday: Mostly clear. Highs in the lower 80s. Lows around 50. | |
| Zone Forecast: St. Clair County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |