| NWS Forecast for: Marion County Issued by: National Weather Service Saint Louis, MO Last Update: 1027 PM CDT Tue Aug 18 2026 | |
| Overnight: Clear late this evening, then partly cloudy with a chance of showers and thunderstorms. Near steady temperature in the lower 70s. Light and variable winds, becoming south around 5 mph. Chance of rain 50 percent. Wednesday: Mostly cloudy. Showers and thunderstorms, mainly in the morning. Humid with highs in the lower 80s. Southwest winds around 5 mph. Chance of rain 90 percent. Wednesday Night: Mostly cloudy. Showers and thunderstorms likely, mainly in the evening. Lows in the upper 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Chance of rain 60 percent. Thursday: Mostly sunny. Highs in the lower 80s. Northeast winds around 5 mph. Thursday Night: Mostly clear. Lows in the mid 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Friday: Sunny. Highs in the mid 80s. Friday Night And Saturday: Mostly clear. A slight chance of showers and thunderstorms. Lows in the mid 60s. Highs in the mid 80s. Chance of rain 20 percent. Saturday Night And Sunday: Mostly clear. Lows in the lower 60s. Highs in the lower 80s. Sunday Night And Monday: Partly cloudy. A 20 percent chance of showers. Lows in the lower 60s. Highs in the mid 80s. Monday Night: Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the mid 60s. Chance of rain 20 percent. Tuesday: Mostly sunny. Highs in the mid 80s. | |
| Zone Forecast: Marion County | |
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