| NWS Forecast for: Brentwood MO Issued by: National Weather Service Saint Louis, MO Last Update: 4:21 am CDT Sep 8, 2026 |  |
Today: Mostly sunny, with a high near 35. Calm wind becoming south 5 to 8 km/h in the morning. Tonight: Mostly clear, with a low around 24. Southeast wind 5 to 10 km/h. Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny and hot, with a high near 37. Heat index values as high as 40. South wind 10 to 13 km/h becoming west in the afternoon. Chance of precipitation is 30%. Wednesday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 10pm. Some of the storms could produce heavy rainfall. Low around 22. Northwest wind 5 to 8 km/h becoming calm. Chance of precipitation is 100%. Thursday: Showers and possibly a thunderstorm before 10am, then showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. High near 27. West wind around 8 km/h becoming north in the afternoon. Chance of precipitation is 90%. Thursday Night: Partly cloudy, with a low around 19. Friday: Mostly sunny, with a high near 30. Friday Night: A 20 percent chance of showers after 1am. Mostly clear, with a low around 21. Saturday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 32. Chance of precipitation is 40%. Saturday Night: A 30 percent chance of showers. Partly cloudy, with a low around 21. Sunday: A 30 percent chance of showers. Mostly sunny, with a high near 31. Sunday Night: A 20 percent chance of showers. Partly cloudy, with a low around 21. Monday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 31. | |
| Brentwood MO 38.62°N 90.35°W (Elev. 499 m) | |
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