| NWS Forecast for: Washington County Issued by: National Weather Service Saint Louis, MO Last Update: 848 AM CDT Sun May 17 2026 | |
Today: Mostly sunny. Highs in the upper 80s. South winds 10 to 15 mph with gusts up to 30 mph. Tonight: Partly cloudy in the evening, then becoming mostly cloudy. Lows in the lower 70s. 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: A chance of thunderstorms. Showers. Highs in the mid 80s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 90 percent. Tuesday Night: Showers likely with a chance of thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Cooler with lows in the mid 50s. Chance of rain 70 percent. Wednesday And Wednesday Night: Mostly cloudy with a 20 percent chance of showers. Highs around 70. Lows in the lower 50s. Thursday: Partly sunny. Highs in the lower 70s. Thursday Night: Mostly cloudy with a 20 percent chance of showers. Lows in the mid 50s. Friday: Mostly cloudy with a chance of showers with a slight chance of thunderstorms. Highs in the upper 70s. Chance of rain 40 percent. Friday Night: Mostly cloudy. A chance of showers, mainly in the evening. Lows in the upper 50s. Chance of rain 40 percent. Saturday: Partly 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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