| NWS Forecast for: Washington County Issued by: National Weather Service Saint Louis, MO Last Update: 637 AM CDT Fri Sep 25 2026 |  |
| Today: Mostly cloudy this morning, then becoming partly sunny. Areas of fog this morning. Highs in the mid 70s. Northeast winds around 5 mph. Tonight: Mostly cloudy. Lows in the upper 50s. Northeast winds around 5 mph. Saturday: Mostly cloudy. Highs in the lower 70s. Northeast winds around 5 mph. Saturday Night: Mostly cloudy. Lows in the upper 50s. Light and variable winds. Sunday: Partly sunny. Highs in the mid 70s. Light and variable winds, becoming northeast around 5 mph in the afternoon. Sunday Night Through Monday Night: Mostly clear. Lows in the mid 50s. Highs in the upper 70s. Tuesday: Mostly sunny. Highs in the lower 80s. Tuesday Night: Mostly cloudy with a chance of showers. A slight chance of thunderstorms after midnight. Lows in the mid 60s. Chance of rain 50 percent. Wednesday: A slight chance of thunderstorms. Showers likely, mainly in the morning. Highs in the upper 70s. Chance of rain 60 percent. Wednesday Night: Mostly cloudy with a 50 percent chance of showers. Lows in the mid 60s. Thursday: Partly sunny with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs around 80. Chance of rain 50 percent. | |
| Zone Forecast: Washington County | |
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