| NWS Forecast for: Saint Louis MO Issued by: National Weather Service Saint Louis, MO Last Update: 4:21 am CDT Sep 9, 2026 |  |
| Today: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Increasing clouds, with a high near 95. Heat index values as high as 104. South wind 5 to 9 mph becoming northwest in the morning. Chance of precipitation is 40%. Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Low around 73. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 90%. Thursday: Showers and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms, mainly between 1pm and 3pm. High near 79. Light and variable wind becoming west around 5 mph in the morning. Chance of precipitation is 100%. Thursday Night: Cloudy, then gradually becoming partly cloudy, with a low around 67. Light northeast wind. Friday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 85. Light and variable wind. Friday Night: Mostly clear, with a low around 70. Saturday: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 90. Chance of precipitation is 40%. Saturday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 71. Sunday: A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 90. Sunday Night: Partly cloudy, with a low around 73. Monday: Mostly sunny, with a high near 94. Monday Night: A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 72. Tuesday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89. | |
| Saint Louis MO 38.64°N 90.23°W (Elev. 538 ft) | |
Visit your local NWS office at: https://www.weather.gov/lsx/ |
