| NWS Forecast for: Marion County Issued by: National Weather Service Saint Louis, MO Last Update: 853 AM CDT Wed Sep 16 2026 | |
Today: Partly sunny. A slight chance of showers and thunderstorms this morning, then a chance of showers and thunderstorms this afternoon. Hot with highs in the mid 90s. Southwest winds around 5 mph. Chance of rain 50 percent. Heat index values up to 106. Tonight: Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 40 percent. Heat index values up to 101 early in the evening. Thursday: Sunny, hot with highs in the upper 90s. West winds around 5 mph. Heat index values up to 107. Thursday Night: Partly cloudy. Humid with lows in the lower 70s. Northwest winds around 5 mph in the evening, becoming light and variable. Heat index values up to 103 early in the evening. Friday: Sunny. Highs in the mid 90s. East winds around 5 mph, becoming southeast in the afternoon. Heat index values up to 103. Friday Night: Mostly clear. Lows in the lower 70s. Heat index values up to 100 early in the evening. Saturday: Mostly sunny. Hot with highs in the upper 90s. Saturday Night And Sunday: Partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 70s. Highs in the lower 90s. Chance of rain 20 percent. Sunday Night: Partly cloudy. A slight chance of showers after midnight. Lows in the upper 60s. Chance of rain 20 percent. Monday: Partly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 20 percent. Monday Night: A slight chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows in the mid 60s. Chance of rain 30 percent. Tuesday: Mostly sunny with a 20 percent chance of showers. Highs in the mid 80s. | |
| Zone Forecast: Marion County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |