| NWS Forecast for: St. Louis County Issued by: National Weather Service Saint Louis, MO Last Update: 1002 PM CDT Thu Sep 10 2026 | |
| Tonight: Mostly cloudy. Patchy fog after midnight. Lows in the upper 60s. North winds around 5 mph this evening, becoming light and variable. Friday: Mostly cloudy. Patchy fog in the morning. A slight chance of showers in the afternoon. Highs in the lower 80s. Southeast winds around 5 mph. Chance of rain 20 percent. Friday Night: Partly cloudy. Lows in the upper 60s. South winds around 5 mph. Saturday: Mostly sunny. Humid with highs around 90. Southwest winds around 5 mph. Saturday Night: Partly cloudy. Lows in the upper 60s. Southwest winds around 5 mph in the evening, becoming light and variable. Sunday: Mostly sunny with a slight chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 20 percent. Sunday Night: Partly cloudy. Lows in the upper 60s. Monday And Monday Night: Mostly clear. Highs in the lower 90s. Lows around 70. Tuesday: Sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 30 percent. Heat index values up to 100 in the afternoon. Tuesday Night: A slight chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows in the upper 60s. Chance of rain 40 percent. Wednesday And Wednesday Night: Partly cloudy. A chance of showers with a slight chance of thunderstorms. Highs in the upper 80s. Lows in the mid 60s. Chance of rain 50 percent. Thursday: Partly sunny with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 50 percent. | |
| Zone Forecast: St. Louis County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |