| NWS Forecast for: Clinton County Issued by: National Weather Service Saint Louis, MO Last Update: 253 PM CDT Tue Jul 21 2026 |  |
Tonight: Mostly clear. Cooler with lows in the upper 60s. North winds 5 to 10 mph. Wednesday: Mostly sunny. Cooler with highs in the lower 80s. North winds 5 to 10 mph. Wednesday Night: Mostly cloudy in the evening, then clearing. Lows in the lower 60s. 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 110. 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 upper 90s. Heat index values up to 110. Monday Night: Mostly clear with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. Heat index values up to 110 early in the evening. Tuesday: Sunny. Highs in the lower 90s. | |
| Zone Forecast: Clinton County | |
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