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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 38.8°N 90.31°W (Text-Only)
NWS Forecast for: Florissant MO
Issued by: National Weather Service Saint Louis, MO
Last Update: 12:26 am CST Dec 5, 2025		Print

  • Overnight

    Overnight: Mostly clear, with a low around 8. Light southeast wind.

    Low: 8 °F

    Mostly Clear



  • Friday

    Friday: Sunny, with a high near 40. South wind 3 to 8 mph.

    High: 40 °F

    Sunny



  • Friday
    Night

    Friday Night: Mostly cloudy, with a steady temperature around 36. South wind around 7 mph becoming west after midnight.

    Low: 36 °F

    Mostly Cloudy



  • Saturday

    Saturday: Partly sunny, with a high near 37. Light and variable wind becoming east around 6 mph in the afternoon.

    High: 37 °F

    Partly Sunny



  • Saturday
    Night

    Saturday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 31. East wind around 6 mph.

    Low: 31 °F

    Mostly Cloudy
    then Chance
    Rain

  • Sunday

    Sunday: A chance of rain before 9am, then a chance of snow between 9am and noon. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.

    High: 38 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Sunday
    Night

    Sunday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy



  • Monday

    Monday: Mostly sunny, with a high near 31.

    High: 31 °F

    Mostly Sunny



  • Monday
    Night

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

    Low: 24 °F

    Partly Cloudy



    • Overnight: Mostly clear, with a low around 8. Light southeast wind.

    Friday: Sunny, with a high near 40. South wind 3 to 8 mph.

    Friday Night: Mostly cloudy, with a steady temperature around 36. South wind around 7 mph becoming west after midnight.

    Saturday: Partly sunny, with a high near 37. Light and variable wind becoming east around 6 mph in the afternoon.

    Saturday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 31. East wind around 6 mph.

    Sunday: A chance of rain before 9am, then a chance of snow between 9am and noon. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.

    Sunday Night: Mostly cloudy, with a low around 15.

    Monday: Mostly sunny, with a high near 31.

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

    Tuesday: Mostly sunny, with a high near 46.

    Tuesday Night: Mostly cloudy, with a low around 37.

    Wednesday: A 30 percent chance of rain. Mostly cloudy, with a high near 45.

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

    Thursday: Mostly cloudy, with a high near 33.


    Florissant MO
     38.8°N 90.31°W (Elev. 525 ft)

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