Weather forecast for: Alton MO
Last Update: 7:56 pm CDT Sep 6, 2026
Tonight: Partly cloudy, with a low around 67. Light northeast wind.
Labor Day: Sunny and hot, with a high near 93. East wind 3 to 6 mph.
Monday Night: Mostly clear, with a low around 61. East wind around 6 mph becoming calm after midnight.
Tuesday: Sunny and hot, with a high near 96. Light and variable wind.
Tuesday Night: Mostly clear, with a low around 68. Calm wind.
Wednesday: Sunny and hot, with a high near 99.
Wednesday Night: A 50 percent chance of showers after 1am. Partly cloudy, with a low around 70.
Thursday: Showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 90.
Thursday Night: A chance of showers before 1am. Partly cloudy, with a low around 63.
Friday: Mostly sunny, with a high near 90.
Friday Night: Partly cloudy, with a low around 64.
Saturday: Mostly sunny and hot, with a high near 93.
Saturday Night: Mostly clear, with a low around 66.
Sunday: Mostly sunny, with a high near 91.
WeatherWorld.com
