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.

Fair

31°F

-1°C

Humidity 54%
Wind Speed SW 13 mph
Barometer 30.33 in (1028.1 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 12 Jan 4:51 am CST
Extended Forecast for

Florissant MO

  • Today

    Today: Sunny, with a high near 54. Southwest wind 7 to 10 mph.

    High: 54 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 36. Southwest wind 6 to 8 mph.

    Low: 36 °F

    Mostly Clear

  • Tuesday

    Tuesday: Increasing clouds, with a high near 60. Southwest wind 9 to 14 mph, with gusts as high as 26 mph.

    High: 60 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 39. West wind 8 to 10 mph.

    Low: 39 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a temperature falling to around 32 by 5pm. Northwest wind 11 to 18 mph, with gusts as high as 31 mph.

    High: 42 °F⇓

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 32.

    High: 32 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of snow showers after noon. Partly sunny, with a high near 42.

    High: 42 °F

    Partly Sunny
    then Slight
    Chance Snow
    Showers

Detailed Forecast

Today
Sunny, with a high near 54. Southwest wind 7 to 10 mph.
Tonight
Mostly clear, with a low around 36. Southwest wind 6 to 8 mph.
Tuesday
Increasing clouds, with a high near 60. Southwest wind 9 to 14 mph, with gusts as high as 26 mph.
Tuesday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 39. West wind 8 to 10 mph.
Wednesday
Mostly cloudy, with a temperature falling to around 32 by 5pm. Northwest wind 11 to 18 mph, with gusts as high as 31 mph.
Wednesday Night
Partly cloudy, with a low around 18.
Thursday
Mostly sunny, with a high near 32.
Thursday Night
Mostly cloudy, with a low around 28.
Friday
A 20 percent chance of snow showers after noon. Partly sunny, with a high near 42.
Friday Night
Mostly cloudy, with a low around 21.
Saturday
Mostly cloudy, with a high near 29.
Saturday Night
Partly cloudy, with a low around 12.
Sunday
Mostly sunny, with a high near 29.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Florissant MO
 38.8°N 90.31°W (Elev. 525 ft)
Last Update:
3:41 am CST Jan 12, 2026
Forecast Valid:
5am CST Jan 12, 2026-6pm CST Jan 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation