| NWS Forecast for: Marion County Issued by: National Weather Service Saint Louis, MO Last Update: 623 PM CDT Wed Jul 22 2026 |  |
| Tonight: Partly cloudy this evening, then clearing. Lows in the upper 50s. Northeast winds 5 to 10 mph. Thursday: Sunny. Highs around 80. East winds around 5 mph. Thursday Night: Mostly cloudy. Scattered showers after midnight. Lows in the lower 60s. East winds around 5 mph. Chance of rain 40 percent. Friday: Showers likely, mainly in the morning. Highs in the mid 70s. Southeast winds 5 to 10 mph. Chance of rain 70 percent. Friday Night: Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Lows in the mid 60s. Southeast winds 5 to 10 mph. Chance of rain 50 percent. Saturday: Partly sunny with a slight chance of showers and thunderstorms in the morning, then sunny in the afternoon. Warmer with highs in the upper 80s. Chance of rain 20 percent. Heat index values up to 100 in the afternoon. Saturday Night Through Monday Night: Mostly clear. Lows in the lower 70s. Highs in the mid 90s. Heat index values up to 110. Tuesday: Mostly sunny. Highs in the lower 90s. Tuesday Night: Partly cloudy. A slight chance of showers after midnight. Lows in the lower 70s. Chance of rain 20 percent. Wednesday: Mostly sunny. Highs in the upper 80s. | |
| Zone Forecast: Marion County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |