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

24°F

-4°C

Humidity 57%
Wind Speed S 6 mph
Barometer 30.29 in (1027.0 mb)
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 24 Feb 12:51 am CST
Extended Forecast for

Florissant MO

  • Overnight

    Overnight: Partly cloudy, with a low around 20. Light south wind increasing to 5 to 9 mph.

    Low: 20 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 58. Breezy, with a south wind 10 to 20 mph, with gusts as high as 33 mph.

    High: 58 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35. Southwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 21 mph.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 53. Calm wind becoming northeast around 6 mph in the afternoon.

    High: 53 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 38. East wind 6 to 8 mph. Chance of precipitation is 60%.

    Low: 38 °F

    Rain Likely

  • Thursday

    Thursday: A 20 percent chance of rain before noon. Partly sunny, with a high near 51.

    High: 51 °F

    Slight Chance
    Rain then
    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 20. Light south wind increasing to 5 to 9 mph.
Tuesday
Increasing clouds, with a high near 58. Breezy, with a south wind 10 to 20 mph, with gusts as high as 33 mph.
Tuesday Night
Mostly cloudy, with a low around 35. Southwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 21 mph.
Wednesday
Partly sunny, with a high near 53. Calm wind becoming northeast around 6 mph in the afternoon.
Wednesday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 38. East wind 6 to 8 mph. Chance of precipitation is 60%.
Thursday
A 20 percent chance of rain before noon. Partly sunny, with a high near 51.
Thursday Night
Mostly clear, with a low around 34.
Friday
Sunny, with a high near 65.
Friday Night
Mostly clear, with a low around 42.
Saturday
Sunny, with a high near 66.
Saturday Night
Partly cloudy, with a low around 32.
Sunday
A chance of rain and snow. Partly sunny, with a high near 45. Chance of precipitation is 30%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 33. Chance of precipitation is 40%.
Monday
A chance of rain and snow. Mostly cloudy, with a high near 49. Chance of precipitation is 40%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Florissant MO
 38.8°N 90.31°W (Elev. 525 ft)
Last Update:
12:26 am CST Feb 24, 2026
Forecast Valid:
1am CST Feb 24, 2026-6pm CST Mar 2, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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