National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

24°F

-4°C

Humidity 48%
Wind Speed NE 5 mph
Barometer 30.30 in (1027.6 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 29 Jan 11:51 am CST
Extended Forecast for

Florissant MO

  • This Afternoon

    This Afternoon: A 40 percent chance of snow, mainly after 5pm. Cloudy, with a high near 23. Northeast wind around 7 mph.

    High: 23 °F

    Chance Snow

  • Tonight

    Tonight: Snow likely, mainly before 9pm. Cloudy, with a low around 6. North wind 3 to 6 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 6 °F

    Snow Likely
    then Mostly
    Cloudy

  • Friday

    Friday: Cloudy, then gradually becoming mostly sunny and cold, with a high near 18. Light north wind increasing to 5 to 10 mph in the morning.

    High: 18 °F

    Cold

  • Friday Night

    Friday Night: Cloudy during the early evening, then gradual clearing, with a low around 4. Wind chill values as low as -10. Northwest wind around 10 mph, with gusts as high as 21 mph.

    Low: 4 °F

    Gradual
    Clearing

  • Saturday

    Saturday: Mostly sunny and cold, with a high near 20. Northwest wind 7 to 10 mph.

    High: 20 °F

    Cold

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 3.

    Low: 3 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of snow after noon. Partly sunny, with a high near 29.

    High: 29 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Sunday Night

    Sunday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 20.

    Low: 20 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 35.

    High: 35 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A 40 percent chance of snow, mainly after 5pm. Cloudy, with a high near 23. Northeast wind around 7 mph.
Tonight
Snow likely, mainly before 9pm. Cloudy, with a low around 6. North wind 3 to 6 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
Cloudy, then gradually becoming mostly sunny and cold, with a high near 18. Light north wind increasing to 5 to 10 mph in the morning.
Friday Night
Cloudy during the early evening, then gradual clearing, with a low around 4. Wind chill values as low as -10. Northwest wind around 10 mph, with gusts as high as 21 mph.
Saturday
Mostly sunny and cold, with a high near 20. Northwest wind 7 to 10 mph.
Saturday Night
Mostly clear, with a low around 3.
Sunday
A 20 percent chance of snow after noon. Partly sunny, with a high near 29.
Sunday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 20.
Monday
Partly sunny, with a high near 35.
Monday Night
Mostly cloudy, with a low around 22.
Tuesday
Mostly cloudy, with a high near 36.
Tuesday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 24.
Wednesday
A 30 percent chance of snow. Mostly cloudy, with a high near 35.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Florissant MO
 38.8°N 90.31°W (Elev. 525 ft)
Last Update:
11:07 am CST Jan 29, 2026
Forecast Valid:
12pm CST Jan 29, 2026-6pm CST Feb 4, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation