| NWS Forecast for: Lewis County Issued by: National Weather Service Saint Louis, MO Last Update: 554 PM CDT Thu Jun 19 2025 |  |
| Tonight: Mostly clear. Lows in the mid 60s. South winds around 5 mph. Friday: Mostly sunny. Highs in the lower 90s. South winds 10 to 15 mph with gusts up to 30 mph. Heat index values up to 101 in the afternoon. Friday Night: Clear. Not as cool with lows in the mid 70s. South winds 10 to 15 mph with gusts up to 30 mph. Saturday: Sunny with highs in the lower 90s. Southwest winds 15 to 20 mph with gusts up to 30 mph. Heat index values up to 106. Saturday Night: Mostly clear. Lows in the mid 70s. South winds 10 to 15 mph with gusts up to 30 mph. Heat index values up to 102 early in the evening. Sunday: Sunny. Highs in the lower 90s. Heat index values up to 100. Sunday Night Through Monday Night: Mostly clear. Lows in the mid 70s. Highs in the lower 90s. Heat index values up to 100. Tuesday And Tuesday Night: Partly cloudy. A slight chance of showers and thunderstorms. Highs in the lower 90s. Lows in the mid 70s. Chance of rain 20 percent. Heat index values up to 100. Wednesday: Sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20 percent. Heat index values up to 100. Wednesday Night: Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. Thursday: Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 40 percent. | |
| Zone Forecast: Lewis County | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |