| NWS Forecast for: Washington County Issued by: National Weather Service Saint Louis, MO Last Update: 1153 PM CDT Sat May 16 2026 |  |
Overnight: Partly cloudy. Lows in the upper 60s. South winds 5 to 10 mph with gusts up to 25 mph. Sunday: Mostly sunny. Highs in the upper 80s. South winds 10 to 15 mph with gusts up to 30 mph. Sunday Night: Mostly clear in the evening, then becoming partly cloudy. Lows around 70. South winds 10 to 15 mph with gusts up to 30 mph. Monday: Partly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 50 percent. Monday Night: Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the upper 60s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 20 percent. Tuesday And Tuesday Night: Showers with a chance of thunderstorms. Highs in the mid 80s. Lows in the upper 50s. Chance of rain 90 percent. Wednesday: A slight chance of thunderstorms in the morning. Mostly cloudy with a slight chance of showers. Cooler with highs in the lower 70s. Chance of rain 20 percent. Wednesday Night: Mostly cloudy with a 20 percent chance of showers. Lows in the lower 50s. Thursday: Partly sunny. Highs in the lower 70s. Thursday Night Through Friday Night: Mostly cloudy with a 20 percent chance of showers. Lows in the mid 50s. Highs in the mid 70s. Saturday: Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 20 percent. | |
| Zone Forecast: Washington County | |
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