| NWS Forecast for: St. Clair County Issued by: National Weather Service Saint Louis, MO Last Update: 738 AM CDT Sun Apr 19 2026 |  |
| Today: Sunny. Not as cool with highs in the upper 60s. West winds 10 to 15 mph. Gusts up to 30 mph this afternoon. Tonight: Partly cloudy. Lows around 40. North winds 5 to 10 mph. Monday: Sunny. Highs in the upper 60s. East winds around 5 mph, becoming southeast in the afternoon. Monday Night: Mostly clear. Not as cool with lows around 50. South winds 5 to 10 mph. Tuesday: Mostly sunny. Not as cool with highs in the upper 70s. Southwest winds 10 to 15 mph with gusts up to 25 mph. Tuesday Night Through Wednesday Night: Mostly clear. Lows in the upper 50s. Highs in the upper 70s. Thursday: Mostly sunny. Highs in the lower 80s. Thursday Night And Friday: Showers likely with a chance of thunderstorms. Lows in the lower 60s. Highs in the mid 70s. Chance of rain 70 percent. Friday Night: Mostly cloudy with a chance of showers with a slight chance of thunderstorms in the evening, then partly cloudy with showers likely after midnight. Cooler with lows around 50. Chance of rain 70 percent. Saturday: Mostly sunny with a 20 percent chance of showers. Highs around 70. | |
| Zone Forecast: St. Clair County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |