| NWS Forecast for: Marion County Issued by: National Weather Service Saint Louis, MO Last Update: 812 PM CDT Tue Sep 1 2026 | |
Tonight: Clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 101 early this evening. Wednesday: Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 106. Wednesday Night: Clear. Lows in the upper 70s. South winds around 5 mph. Heat index values up to 103 early in the evening. Thursday: Sunny, hot with highs in the upper 90s. Southwest winds 5 to 10 mph. Heat index values up to 105. Thursday Night: Mostly clear. Lows in the upper 70s. South winds around 5 mph. Heat index values up to 103 early in the evening. Friday And Friday Night: Mostly clear. Hot. Highs in the upper 90s. Lows in the mid 70s. Heat index values up to 105. Saturday: Sunny with a slight chance of showers and thunderstorms. Hot with highs in the upper 90s. Chance of rain 20 percent. Heat index values up to 105. Saturday Night And Sunday: Partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 70s. Highs in the mid 90s. Chance of rain 20 percent. Heat index values up to 100. Sunday Night: Partly cloudy in the evening, then becoming mostly clear. Lows around 70. Labor Day: Sunny. Highs in the lower 90s. Monday Night And Tuesday: Partly cloudy. Lows in the upper 60s. Highs in the lower 90s. | |
| Zone Forecast: Marion County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |