| NWS Forecast for: Marion County Issued by: National Weather Service Saint Louis, MO Last Update: 207 PM CDT Mon Jun 29 2026 |  |
This Afternoon: Mostly sunny. Near steady temperature in the lower 90s. South winds around 10 mph with gusts up to 20 mph. Heat index values up to 106. Tonight: Partly cloudy. Humid with lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 106 early in the evening. Tuesday: Sunny with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 109. Tuesday Night: Clear with lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 107 early in the evening. Wednesday: Sunny, hot with highs in the mid 90s. Southwest winds around 5 mph. Heat index values up to 106. Wednesday Night: Clear. Lows in the mid 70s. Heat index values up to 105 early in the evening. Thursday: Sunny, hot with highs in the mid 90s. Heat index values up to 105. Thursday Night: Mostly clear with a slight chance of showers and thunderstorms. Lows in the mid 70s. Chance of rain 20 percent. Heat index values up to 105 early in the evening. Friday: Sunny. A chance of showers and thunderstorms, mainly in the morning. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 105. Friday Night Through Saturday Night: Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 70s. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100. Sunday: Mostly sunny with a chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs around 90. Chance of rain 40 percent. Heat index values up to 100. | |
| Zone Forecast: Marion County | |
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