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.

Fair

27°F

-3°C

Humidity 72%
Wind Speed E 8 mph
Barometer 30.14 in (1021.6 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 9 Feb 12:51 am CST
Extended Forecast for

Florissant MO

  • Overnight

    Overnight: Mostly clear, with a low around 29. East wind around 5 mph becoming calm.

    Low: 29 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 53. Calm wind becoming southeast around 6 mph in the afternoon.

    High: 53 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 42. Southeast wind around 7 mph becoming west after midnight.

    Low: 42 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 59. Northwest wind 6 to 9 mph.

    High: 59 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 32. North wind around 7 mph.

    Low: 32 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 50.

    High: 50 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of rain after noon. Cloudy, with a high near 46.

    High: 46 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: A 40 percent chance of rain. Cloudy, with a low around 34.

    Low: 34 °F

    Chance Rain

Detailed Forecast

Overnight
Mostly clear, with a low around 29. East wind around 5 mph becoming calm.
Monday
Sunny, with a high near 53. Calm wind becoming southeast around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 42. Southeast wind around 7 mph becoming west after midnight.
Tuesday
Sunny, with a high near 59. Northwest wind 6 to 9 mph.
Tuesday Night
Partly cloudy, with a low around 32. North wind around 7 mph.
Wednesday
Mostly sunny, with a high near 50.
Wednesday Night
Mostly cloudy, with a low around 34.
Thursday
A 20 percent chance of rain after noon. Cloudy, with a high near 46.
Thursday Night
A 40 percent chance of rain. Cloudy, with a low around 34.
Friday
A 20 percent chance of rain. Mostly cloudy, with a high near 45.
Friday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 33.
Saturday
A 40 percent chance of rain. Mostly cloudy, with a high near 46.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 34.
Sunday
A 20 percent chance of rain. Sunny, with a high near 48.
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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:
12:26 am CST Feb 9, 2026
Forecast Valid:
1am CST Feb 9, 2026-6pm CST Feb 15, 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