| NWS Forecast for: Montgomery County Issued by: National Weather Service Saint Louis, MO Last Update: 948 PM CDT Thu Sep 17 2026 |  |
Tonight: Mostly clear. A slight chance of showers and thunderstorms this evening. Lows in the lower 70s. West winds around 5 mph, becoming north after midnight. Chance of rain 20 percent. Friday: Sunny with highs in the lower 90s. East winds around 5 mph. Heat index values up to 105 in the afternoon. Friday Night: Mostly clear. Lows in the lower 70s. Southeast winds around 5 mph. Heat index values up to 101 early in the evening. Saturday: Partly sunny. Highs in the mid 90s. Southwest winds 5 to 10 mph. Saturday Night: Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows around 70. South winds around 5 mph, becoming west after midnight. Chance of rain 20 percent. Sunday: Partly sunny with a chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 40 percent. Sunday Night And Monday: Showers likely with a chance of thunderstorms. Lows in the mid 60s. Highs in the upper 70s. Chance of rain 60 percent. Monday Night And Tuesday: Mostly cloudy. A 20 percent chance of showers. Lows in the upper 50s. Highs in the lower 70s. Tuesday Night Through Thursday: Partly cloudy. Lows in the mid 50s. Highs in the upper 70s. | |
| Zone Forecast: Montgomery County | |
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