| NWS Forecast for: Boone County Issued by: National Weather Service Saint Louis, MO Last Update: 423 PM CDT Wed Jul 16 2025 |  |
Tonight: Partly cloudy with a slight chance of showers and thunderstorms this evening, then mostly cloudy with a chance of showers and thunderstorms after midnight. Lows in the lower 70s. Southwest winds 5 to 10 mph. Chance of rain 50 percent. Heat index values up to 104 early this evening. Thursday: Mostly cloudy with a chance of thunderstorms. A chance of showers in the morning, then showers likely in the afternoon. Highs in the mid 80s. North winds 5 to 10 mph with gusts up to 20 mph, becoming northeast in the afternoon. Chance of rain 60 percent. Thursday Night: Mostly cloudy with a chance of showers and thunderstorms. Lows around 70. East winds 5 to 10 mph. Chance of rain 50 percent. Friday: Mostly cloudy in the morning, then becoming partly sunny. A chance of showers and thunderstorms. Humid with highs in the upper 80s. Southeast winds around 5 mph. Chance of rain 50 percent. Friday Night: Partly cloudy. A slight chance of showers and thunderstorms after midnight. Humid with lows in the lower 70s. South winds around 5 mph. Chance of rain 20 percent. Saturday Through Sunday: Partly cloudy with a slight chance of showers and thunderstorms. Highs in the mid 90s. Lows in the mid 70s. Chance of rain 20 percent. Heat index values up to 105. Sunday Night: Mostly clear with a chance of showers and thunderstorms in the evening, then partly cloudy with a slight chance of showers and thunderstorms after midnight. Lows in the mid 70s. Chance of rain 30 percent. Heat index values up to 105 early in the evening. Monday: Sunny. Highs in the mid 90s. Heat index values up to 105. Monday Night: Mostly clear. A slight chance of showers and thunderstorms after midnight. Lows in the mid 70s. Chance of rain 20 percent. Heat index values up to 100 early in the evening. Tuesday And Tuesday Night: Mostly clear. Hot. Highs in the mid 90s. Lows in the mid 70s. Heat index values up to 105. Wednesday: Sunny, hot with highs in the upper 90s. Heat index values up to 105. | |
| Zone Forecast: Boone County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |