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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 38.56°N 90.32°W (Text-Only)
NWS Forecast for: Affton MO
Issued by: National Weather Service Saint Louis, MO
Last Update: 12:26 am CST Dec 5, 2025		Print

  • Overnight

    Overnight: Clear, with a low around 11. Calm wind.

    Low: 11 °F

    Clear



  • Friday

    Friday: Sunny, with a high near 42. South wind 3 to 6 mph.

    High: 42 °F

    Sunny



  • Friday
    Night

    Friday Night: Increasing clouds, with a low around 30. South wind around 6 mph becoming west after midnight.

    Low: 30 °F

    Increasing
    Clouds


  • Saturday

    Saturday: Partly sunny, with a high near 39. Calm wind becoming east around 5 mph in the afternoon.

    High: 39 °F

    Partly Sunny



  • Saturday
    Night

    Saturday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 31. Southeast wind 3 to 5 mph.

    Low: 31 °F

    Mostly Cloudy
    then Chance
    Rain

  • Sunday

    Sunday: A slight chance of rain before 9am, then a slight chance of rain and snow between 9am and noon, then a slight chance of snow after noon. Mostly cloudy, with a high near 39. Chance of precipitation is 20%.

    High: 39 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Snow

  • Sunday
    Night

    Sunday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy



  • Monday

    Monday: Mostly sunny, with a high near 32.

    High: 32 °F

    Mostly Sunny



  • Monday
    Night

    Monday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy



    • Overnight: Clear, with a low around 11. Calm wind.

    Friday: Sunny, with a high near 42. South wind 3 to 6 mph.

    Friday Night: Increasing clouds, with a low around 30. South wind around 6 mph becoming west after midnight.

    Saturday: Partly sunny, with a high near 39. Calm wind becoming east around 5 mph in the afternoon.

    Saturday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 31. Southeast wind 3 to 5 mph.

    Sunday: A slight chance of rain before 9am, then a slight chance of rain and snow between 9am and noon, then a slight chance of snow after noon. Mostly cloudy, with a high near 39. Chance of precipitation is 20%.

    Sunday Night: Mostly cloudy, with a low around 16.

    Monday: Mostly sunny, with a high near 32.

    Monday Night: Partly cloudy, with a low around 24.

    Tuesday: Mostly sunny, with a high near 47.

    Tuesday Night: Mostly cloudy, with a low around 38.

    Wednesday: A 20 percent chance of rain. Mostly cloudy, with a high near 48.

    Wednesday Night: Mostly cloudy, with a low around 23.

    Thursday: Mostly cloudy, with a high near 34.


    Affton MO
     38.56°N 90.32°W (Elev. 564 ft)

    Visit your local NWS office at: https://www.weather.gov/lsx/