| NWS Forecast for: Marion County Issued by: National Weather Service Saint Louis, MO Last Update: 253 PM CDT Tue Jul 21 2026 | |
| Tonight: Mostly clear. Lows in the upper 60s. Northwest winds 5 to 10 mph. Wednesday: Mostly sunny. Cooler with highs in the upper 70s. North winds 5 to 10 mph. Wednesday Night: Mostly cloudy in the evening, then clearing. Lows around 60. Northeast winds 5 to 10 mph. Thursday: Sunny. Highs in the upper 70s. Northeast winds around 5 mph. Thursday Night: Partly cloudy. Lows in the lower 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Friday And Friday Night: Mostly cloudy. A slight chance of showers and thunderstorms. Highs in the upper 70s. Lows in the lower 60s. Chance of rain 20 percent. Saturday: Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the mid 80s. Chance of rain 20 percent. Saturday Night And Sunday: Mostly clear. Lows in the upper 60s. Highs in the lower 90s. Heat index values up to 105. Sunday Night: Mostly clear. Lows in the mid 70s. Heat index values up to 105 early in the evening. Monday: Mostly sunny. Hot with highs in the mid 90s. Heat index values up to 105. Monday Night: Mostly clear with a slight chance of showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the lower 70s. Chance of rain 20 percent. Heat index values up to 105 early in the evening. Tuesday: Sunny. Highs in the lower 90s. | |
| Zone Forecast: Marion County | |
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