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

45°F

7°C

Humidity 49%
Wind Speed NW 7 mph
Barometer 30.03 in (1016.6 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 16 Nov 7:51 am CST
Extended Forecast for

Florissant MO

  • Today

    Today: Sunny, with a high near 58. North wind 5 to 7 mph.

    High: 58 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 39. Calm wind.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 59. Light east wind becoming southeast 6 to 11 mph in the morning. Winds could gust as high as 21 mph.

    High: 59 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then showers likely after 3am. Mostly cloudy, with a low around 50. Southeast wind around 10 mph. Chance of precipitation is 70%.

    Low: 50 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: A 30 percent chance of showers before noon. Partly sunny, with a high near 71. Southeast wind 7 to 9 mph.

    High: 71 °F

    Chance
    Showers then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of rain after noon. Mostly cloudy, with a high near 66.

    High: 66 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance Rain

  • Thursday

    Thursday: Rain likely and possibly a thunderstorm, then rain after noon. High near 66. Chance of precipitation is 80%.

    High: 66 °F

    Rain

Detailed Forecast

Today
Sunny, with a high near 58. North wind 5 to 7 mph.
Tonight
Mostly clear, with a low around 39. Calm wind.
Monday
Increasing clouds, with a high near 59. Light east wind becoming southeast 6 to 11 mph in the morning. Winds could gust as high as 21 mph.
Monday Night
A chance of showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then showers likely after 3am. Mostly cloudy, with a low around 50. Southeast wind around 10 mph. Chance of precipitation is 70%.
Tuesday
A 30 percent chance of showers before noon. Partly sunny, with a high near 71. Southeast wind 7 to 9 mph.
Tuesday Night
Mostly cloudy, with a low around 52.
Wednesday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 66.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 54.
Thursday
Rain likely and possibly a thunderstorm, then rain after noon. High near 66. Chance of precipitation is 80%.
Thursday Night
Rain likely, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 56. Chance of precipitation is 70%.
Friday
A 50 percent chance of rain. Partly sunny, with a high near 65.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 44.
Saturday
Partly sunny, with a high near 53.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Florissant MO
 38.8°N 90.34°W (Elev. 499 ft)
Last Update:
8:26 am CST Nov 16, 2025
Forecast Valid:
8am CST Nov 16, 2025-6pm CST Nov 22, 2025
 
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