| NWS Forecast for: Montgomery County Issued by: National Weather Service Saint Louis, MO Last Update: 618 PM CDT Wed Aug 12 2026 |  |
Tonight: Partly cloudy with isolated showers and thunderstorms. Lows in the mid 70s. Southeast winds around 5 mph. Chance of rain 20 percent. Heat index values up to 103 early this evening. Thursday: Mostly sunny. Isolated showers and thunderstorms in the morning. Hot with highs in the mid 90s. South winds around 5 mph. Chance of rain 20 percent. Heat index values up to 109 in the afternoon. Thursday Night: Mostly clear with isolated showers and thunderstorms in the evening, then partly cloudy after midnight. Lows in the mid 70s. South winds around 5 mph. Chance of rain 20 percent. Heat index values up to 108 early in the evening. Friday: Mostly sunny. Hot with highs in the mid 90s. Southwest winds around 5 mph. Heat index values up to 109 in the afternoon. Friday Night: Mostly clear. Lows in the mid 70s. South winds around 5 mph. Heat index values up to 109 early in the evening. Saturday: Mostly sunny. Hot with highs in the mid 90s. Heat index values up to 105 in the afternoon. Saturday Night And Sunday: Mostly clear. Hot. Lows in the lower 70s. Highs in the mid 90s. Heat index values up to 110. Sunday Night: Partly cloudy. A chance of showers and thunderstorms after midnight. Lows around 70. Chance of rain 30 percent. Heat index values up to 105 early in the evening. Monday: Partly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 20 percent. Monday Night Through Tuesday Night: Partly cloudy with a 20 percent chance of showers. Lows in the upper 60s. Highs in the upper 80s. Wednesday: Mostly sunny. Highs around 90. | |
| Zone Forecast: Montgomery County | |
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