| NWS Forecast for: St. Clair County Issued by: National Weather Service Saint Louis, MO Last Update: 338 PM CDT Sat Aug 22 2026 | |
| Tonight: Mostly clear. Lows in the mid 60s. North winds 5 to 10 mph. Sunday: Sunny. Highs in the lower 80s. Northwest winds around 5 mph. Sunday Night: Mostly cloudy in the evening, then clearing. Lows in the lower 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Monday: Mostly sunny. Highs in the lower 80s. Southeast winds around 5 mph. Monday Night: Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 60s. East winds around 5 mph. Chance of rain 20 percent. Tuesday And Tuesday Night: Partly cloudy. Highs in the mid 80s. Lows in the upper 60s. Wednesday: Partly sunny. Highs in the upper 80s. Wednesday Night: Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the upper 60s. Chance of rain 20 percent. Thursday Through Friday: Mostly clear. Highs in the upper 80s. Lows in the mid 60s. Friday Night: Partly cloudy in the evening, then becoming mostly clear. Lows in the upper 60s. Saturday: Mostly sunny. A slight chance of showers in the morning. Highs in the upper 80s. Chance of rain 20 percent. | |
| Zone Forecast: St. Clair County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |