| NWS Forecast for: Washington County Issued by: National Weather Service Saint Louis, MO Last Update: 1230 PM CDT Fri Aug 15 2025 | |
This Afternoon: Sunny. Near steady temperature in the lower 90s. South winds around 5 mph. Heat index values up to 103. Tonight: Mostly clear. Lows in the mid 70s. Southeast winds around 5 mph. Heat index values up to 101 early in the evening. Saturday: Sunny, hot with highs in the upper 90s. South winds around 5 mph. Heat index values up to 106. Saturday Night: Mostly clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 103 early in the evening. Sunday: Sunny, hot with highs in the upper 90s. Light and variable winds, becoming south around 5 mph in the afternoon. Heat index values up to 107. Sunday Night Through Tuesday: Mostly clear. Hot. Lows in the mid 70s. Highs in the upper 90s. Heat index values up to 105. Tuesday Night And Wednesday: Partly cloudy. A chance of showers and thunderstorms. Lows in the lower 70s. Highs around 90. Chance of rain 30 percent. Heat index values up to 100. Wednesday Night: Partly cloudy. Lows in the upper 60s. Thursday: Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 20 percent. | |
| Zone Forecast: Washington County | |
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