| NWS Forecast for: Washington County Issued by: National Weather Service Saint Louis, MO Last Update: 1123 AM CDT Tue Jul 28 2026 |  |
This Afternoon: Sunny. Near steady temperature in the upper 80s. North winds around 5 mph. Heat index values up to 106. Tonight: Mostly cloudy in the evening, then clearing. Cooler with lows in the upper 60s. Northeast winds around 5 mph. Heat index values up to 100 early in the evening. Wednesday: Sunny. Highs in the mid 80s. Northeast winds around 5 mph. Wednesday Night: Clear. Lows in the lower 60s. Northeast winds around 5 mph in the evening, becoming light and variable. Thursday: Sunny. Highs in the upper 80s. Light and variable winds. Thursday Night: Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 60s. Friday: Partly sunny in the morning, then becoming mostly cloudy. A chance of showers and thunderstorms. Highs in the mid 80s. Chance of rain 50 percent. Friday Night And Saturday: Showers likely with a chance of thunderstorms. Lows in the upper 60s. Highs around 80. Chance of rain 70 percent. Saturday Night And Sunday: Partly cloudy. A slight chance of showers and thunderstorms. Lows in the upper 60s. Highs in the lower 80s. Chance of rain 20 percent. Sunday Night: Mostly clear. Lows in the upper 60s. Monday: Sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 20 percent. | |
| Zone Forecast: Washington County | |
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