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.

A Few Clouds

22°F

-6°C

Humidity 52%
Wind Speed W 15 G 25 mph
Barometer 30.15 in (1022.5 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill9°F (-13°C)
Last update 16 Mar 10:51 pm CDT
Extended Forecast for

Florissant MO

  • Tonight

    Tonight: Mostly cloudy early, then gradual clearing, with a low around 16. Northwest wind 13 to 15 mph, with gusts as high as 25 mph.

    Low: 16 °F

    Gradual
    Clearing

  • Tuesday

    Tuesday: Increasing clouds, with a high near 35. Northwest wind 6 to 9 mph becoming south in the afternoon.

    High: 35 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A chance of snow before 4am, then a slight chance of rain. Cloudy, with a low around 32. Southeast wind 7 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.

    Low: 32 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: Sunny, with a high near 65. South wind 8 to 10 mph becoming west in the afternoon.

    High: 65 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 45. West wind around 5 mph becoming calm in the evening.

    Low: 45 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy early, then gradual clearing, with a low around 16. Northwest wind 13 to 15 mph, with gusts as high as 25 mph.
Tuesday
Increasing clouds, with a high near 35. Northwest wind 6 to 9 mph becoming south in the afternoon.
Tuesday Night
A chance of snow before 4am, then a slight chance of rain. Cloudy, with a low around 32. Southeast wind 7 to 11 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.
Wednesday
Sunny, with a high near 65. South wind 8 to 10 mph becoming west in the afternoon.
Wednesday Night
Partly cloudy, with a low around 45. West wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 74.
Thursday Night
Partly cloudy, with a low around 48.
Friday
Mostly sunny, with a high near 78.
Friday Night
Partly cloudy, with a low around 54.
Saturday
Sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 51.
Sunday
Sunny, with a high near 72.
Sunday Night
Partly cloudy, with a low around 41.
Monday
Mostly sunny, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Florissant MO
 38.8°N 90.34°W (Elev. 499 ft)
Last Update:
8:56 pm CDT Mar 16, 2026
Forecast Valid:
11pm CDT Mar 16, 2026-6pm CDT Mar 23, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

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Chance of Precipitation