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

52°F

11°C

Humidity 32%
Wind Speed E 9 mph
Barometer 30.36 in (1028.5 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 23 Mar 5:51 pm CDT
Extended Forecast for

Florissant MO

  • Tonight

    Tonight: Mostly cloudy, with a low around 38. East wind 5 to 10 mph, with gusts as high as 23 mph.

    Low: 38 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 63. Southeast wind 6 to 10 mph, with gusts as high as 21 mph.

    High: 63 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 46. Southeast wind 7 to 9 mph.

    Low: 46 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77. South wind 5 to 9 mph.

    High: 77 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 63. South wind around 9 mph.

    Low: 63 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm. Low around 43. Breezy. Chance of precipitation is 80%.

    Low: 43 °F

    Showers and
    Breezy

  • Friday

    Friday: A chance of showers before 1pm, then a slight chance of rain after 1pm. Mostly cloudy, with a high near 52. Breezy. Chance of precipitation is 40%.

    High: 52 °F

    Chance
    Showers and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 38. East wind 5 to 10 mph, with gusts as high as 23 mph.
Tuesday
Mostly sunny, with a high near 63. Southeast wind 6 to 10 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly cloudy, with a low around 46. Southeast wind 7 to 9 mph.
Wednesday
Mostly sunny, with a high near 77. South wind 5 to 9 mph.
Wednesday Night
Mostly clear, with a low around 63. South wind around 9 mph.
Thursday
Sunny, with a high near 90.
Thursday Night
Showers and possibly a thunderstorm. Low around 43. Breezy. Chance of precipitation is 80%.
Friday
A chance of showers before 1pm, then a slight chance of rain after 1pm. Mostly cloudy, with a high near 52. Breezy. Chance of precipitation is 40%.
Friday Night
Partly cloudy, with a low around 33.
Saturday
Sunny, with a high near 58.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Mostly sunny, with a high near 64.
Sunday Night
Mostly cloudy, with a low around 49.
Monday
A 20 percent chance of rain. Mostly sunny, with a high near 72.
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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:
5:21 pm CDT Mar 23, 2026
Forecast Valid:
6pm CDT Mar 23, 2026-6pm CDT Mar 30, 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