| NWS Forecast for: Brentwood MO Issued by: National Weather Service Saint Louis, MO Last Update: 8:31 pm CDT Aug 11, 2026 |  |
Tonight: Partly cloudy, with a low around 81. Southwest wind around 5 mph. Wednesday: Scattered showers and thunderstorms, mainly between 10am and 11am. Mostly sunny and hot, with a high near 98. Heat index values as high as 109. Southwest wind around 7 mph. Chance of precipitation is 30%. Wednesday Night: Isolated showers and thunderstorms. Partly cloudy, with a low around 79. South wind around 6 mph. Chance of precipitation is 20%. Thursday: Scattered showers and thunderstorms before 7am. Mostly sunny and hot, with a high near 98. Heat index values as high as 110. Northeast wind around 6 mph becoming southwest in the morning. Chance of precipitation is 30%. Thursday Night: Partly cloudy, with a low around 77. South wind around 6 mph becoming east after midnight. Friday: Mostly sunny and hot, with a high near 97. Friday Night: Partly cloudy, with a low around 77. Saturday: Mostly sunny and hot, with a high near 100. Saturday Night: Mostly clear, with a low around 79. Sunday: Sunny and hot, with a high near 99. Sunday Night: Partly cloudy, with a low around 75. Monday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90. Monday Night: Partly cloudy, with a low around 72. Tuesday: Mostly sunny, with a high near 91. | |
| Brentwood MO 38.62°N 90.35°W (Elev. 499 ft) | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |
