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.

Overcast

33°F

1°C

Humidity 64%
Wind Speed S 10 mph
Barometer 30.01 in (1017.5 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 5 Feb 12:51 pm CST
Extended Forecast for

Florissant MO

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 40. South wind 6 to 8 mph.

    High: 40 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 32. South wind 5 to 8 mph becoming west after midnight.

    Low: 32 °F

    Decreasing
    Clouds

  • Friday

    Friday: Sunny through mid morning, then becoming mostly cloudy, with a high near 47. West wind 13 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 33 mph.

    High: 47 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 24. North wind 6 to 14 mph, with gusts as high as 26 mph.

    Low: 24 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 35. Northeast wind around 6 mph becoming southeast in the afternoon.

    High: 35 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 40. South wind 6 to 8 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 32. South wind 5 to 8 mph becoming west after midnight.
Friday
Sunny through mid morning, then becoming mostly cloudy, with a high near 47. West wind 13 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 33 mph.
Friday Night
Partly cloudy, with a low around 24. North wind 6 to 14 mph, with gusts as high as 26 mph.
Saturday
Sunny, with a high near 35. Northeast wind around 6 mph becoming southeast in the afternoon.
Saturday Night
Mostly cloudy, with a low around 27.
Sunday
Mostly sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 31.
Monday
Sunny, with a high near 58.
Monday Night
Mostly clear, with a low around 42.
Tuesday
A 20 percent chance of rain. Partly sunny, with a high near 65.
Tuesday Night
A 40 percent chance of rain. Cloudy, with a low around 44.
Wednesday
A 30 percent chance of rain. Mostly cloudy, with a high near 55.
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 pm CST Feb 5, 2026
Forecast Valid:
1pm CST Feb 5, 2026-6pm CST Feb 11, 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