Weather World
St Clair County, MO 7-Day Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
St Clair County Weather Forecast
St Clair County, MO Weather Forecast Date: 127 AM CDT Tue Sep 08 2026
Weather forecast for St Clair County, MO
Tonight Lo: 75°F Lo: 24°C |
Tonight... Mostly clear. Lows in the mid 70s. Southeast winds around 5 mph with gusts up to 20 mph. |
Tue Hi: 100°FHi: 38°C Lo: 79°F Lo: 26°C |
Tuesday... Sunny, hot with highs around 100. South winds 5 to 10 mph. |
Wed Hi: 99°FHi: 37°C Lo: 69°F Lo: 21°C |
Wednesday... Sunny. A chance of showers and thunderstorms in the afternoon. Hot with highs in the upper 90s. Temperature falling into the lower 90s in the afternoon. Southwest winds 5 to 10 mph with gusts up to 20 mph. Chance of rain 50%. |
| Thu Hi: 85°FHi: 29°C Lo: 65°F Lo: 18°C |
Thursday... Showers likely with a slight chance of thunderstorms in the morning, then partly sunny in the afternoon. Not as warm with highs in the mid 80s. Chance of rain 70%. |
Fri Hi: 89°FHi: 32°C Lo: 69°F Lo: 21°C |
Friday... Mostly sunny. A slight chance of showers in the morning. Hot with highs in the upper 80s. Chance of rain 20%. |
| Sat Hi: 89°FHi: 32°C Lo: 69°F Lo: 21°C |
Saturday... Mostly sunny with a chance of showers with a slight chance of thunderstorms. Hot with highs in the upper 80s. Chance of rain 50%. |
| Sun Hi: 89°FHi: 32°C Lo: 69°F Lo: 21°C |
Sunday... Partly cloudy. A chance of showers with a slight chance of thunderstorms. Hot. Highs in the upper 80s. Lows in the upper 60s. Chance of rain 30%. |
St Clair County Radar Loop
Use the map search tool if you want to place a location marker on the radar map...