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

62°F

17°C

Humidity 23%
Wind Speed SE 15 mph
Barometer 30.16 in (1021.3 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 24 Mar 6:51 pm CDT
Extended Forecast for

Florissant MO

  • Tonight

    Tonight: Partly cloudy, with a low around 46. Southeast wind 5 to 8 mph.

    Low: 46 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 79. South wind 5 to 10 mph.

    High: 79 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 64. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 64 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 90. Southwest wind 10 to 14 mph, with gusts as high as 24 mph.

    High: 90 °F

    Sunny

  • Thursday Night

    Thursday Night: Rain. Low around 43. Southwest wind 10 to 17 mph becoming north after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 90%.

    Low: 43 °F

    Rain Likely
    then Rain

  • Friday

    Friday: A 30 percent chance of rain before 1pm. Partly sunny, with a high near 52.

    High: 52 °F

    Chance Rain

  • Friday Night

    Friday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 46. Southeast wind 5 to 8 mph.
Wednesday
Mostly sunny, with a high near 79. South wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 64. South wind around 10 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 90. Southwest wind 10 to 14 mph, with gusts as high as 24 mph.
Thursday Night
Rain. Low around 43. Southwest wind 10 to 17 mph becoming north after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 90%.
Friday
A 30 percent chance of rain before 1pm. Partly sunny, with a high near 52.
Friday Night
Mostly clear, with a low around 33.
Saturday
Sunny, with a high near 59.
Saturday Night
Partly cloudy, with a low around 42.
Sunday
Partly sunny, with a high near 65.
Sunday Night
Mostly cloudy, with a low around 51.
Monday
Mostly sunny, with a high near 80.
Monday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 60.
Tuesday
A 40 percent chance of rain and thunderstorms. Partly sunny, with a high near 78.
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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:
5:46 pm CDT Mar 24, 2026
Forecast Valid:
7pm CDT Mar 24, 2026-6pm CDT Mar 31, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation