| NWS Forecast for: Franklin County Issued by: National Weather Service Saint Louis, MO Last Update: 153 PM CDT Fri Jun 26 2026 |  |
This Afternoon: Showers with a chance of thunderstorms. Some thunderstorms may produce heavy rainfall. Near steady temperature in the upper 70s. South winds around 5 mph. Chance of rain 80 percent. Tonight: Mostly cloudy. Showers likely with a chance of thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Some thunderstorms may produce heavy rainfall in the evening. Lows in the upper 60s. South winds around 5 mph in the evening, becoming light and variable. Chance of rain 70 percent. Saturday: Mostly cloudy in the morning, then becoming partly sunny. A chance of showers and thunderstorms. Humid with highs in the mid 80s. Southwest winds around 5 mph. Chance of rain 50 percent. Saturday Night: Partly cloudy in the evening, then clearing. A chance of showers. A chance of thunderstorms, mainly in the evening. Humid with lows in the lower 70s. Southeast winds around 5 mph. Chance of rain 40 percent. Sunday: Sunny with highs in the lower 90s. South winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 107 in the afternoon. Sunday Night Through Monday Night: Mostly clear. Lows in the mid 70s. Highs in the mid 90s. Heat index values up to 110. Tuesday And Tuesday Night: Clear, hot. Highs in the mid 90s. Lows in the mid 70s. Heat index values up to 110. Wednesday Through Thursday: Mostly clear. Hot. Highs in the mid 90s. Lows in the mid 70s. Heat index values up to 105. | |
| Zone Forecast: Franklin County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |