| NWS Forecast for: St. Louis County Issued by: National Weather Service Saint Louis, MO Last Update: 1143 AM CDT Sun Jun 21 2026 |  |
This Afternoon: Showers and thunderstorms. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible. Near steady temperature in the upper 70s. South winds 10 to 15 mph. Gusts up to 30 mph. Chance of rain 90 percent. Tonight: Mostly cloudy. Scattered showers and thunderstorms in the evening. Some thunderstorms may produce heavy rainfall in the evening. Lows in the mid 60s. Southwest winds 10 to 15 mph with gusts up to 25 mph, becoming northwest 5 to 10 mph after midnight. Chance of rain 50 percent. Monday: Mostly cloudy in the morning, then becoming partly sunny. Highs in the mid 70s. North winds 5 to 10 mph. Monday Night: Partly cloudy in the evening, then becoming mostly clear. Lows around 60. Northeast winds 5 to 10 mph. Tuesday: Sunny. Highs in the lower 80s. Northeast winds around 5 mph. Tuesday Night: Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 60s. Wednesday: Mostly sunny with a slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the mid 80s. Chance of rain 30 percent. Wednesday Night: Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the mid 60s. Chance of rain 20 percent. Thursday: Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 30 percent. Thursday Night: Mostly clear in the evening, then becoming partly cloudy. A slight chance of thunderstorms in the evening. A slight chance of showers. Lows in the lower 60s. Chance of rain 20 percent. Friday: Mostly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 40 percent. Friday Night And Saturday: Mostly cloudy. A chance of showers and thunderstorms. Lows in the upper 60s. Highs in the upper 80s. Chance of rain 50 percent. | |
| Zone Forecast: St. Louis County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |