| NWS Forecast for: St. Louis City Issued by: National Weather Service Saint Louis, MO Last Update: 638 AM CDT Sat Aug 8 2026 |  |
Today: Sunny. Highs around 90. West winds around 5 mph. Heat index values up to 101. Tonight: Mostly clear. Humid with lows in the lower 70s. Southeast winds around 5 mph. Heat index values up to 100 early in the evening. Sunday: Sunny with highs in the lower 90s. South winds 5 to 10 mph. Heat index values up to 106. Sunday Night: Mostly clear. Humid with lows in the mid 70s. South winds 5 to 10 mph. Heat index values up to 105 early in the evening. Monday: Sunny, hot with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 109 in the afternoon. Monday Night And Tuesday: Mostly clear. Lows in the upper 70s. Highs in the mid 90s. Heat index values up to 110. Tuesday Night And Wednesday: Partly cloudy. A chance of showers and thunderstorms. Lows in the mid 70s. Highs in the lower 90s. Chance of rain 40 percent. Heat index values up to 105. Wednesday Night: Partly cloudy with a chance of thunderstorms. A chance of showers. Lows in the lower 70s. Chance of rain 50 percent. Heat index values up to 105 early in the evening. Thursday: Partly sunny in the morning, then becoming mostly cloudy. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 50 percent. Thursday Night: Mostly cloudy with a slight chance of thunderstorms. A chance of showers in the evening, then showers likely after midnight. Lows in the upper 60s. Chance of rain 60 percent. Friday: Mostly cloudy in the morning, then becoming partly sunny. A chance of showers. A slight chance of thunderstorms in the morning, then a chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 40 percent. | |
| Zone Forecast: St. Louis City | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |