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

75°F

24°C

Humidity 82%
Wind Speed Calm
Barometer 30.03 in (1015.7 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 14 Oct 12:51 pm CDT
Extended Forecast for

Florissant MO

  • This Afternoon

    This Afternoon: A 30 percent chance of showers, mainly between 2pm and 4pm. Cloudy, with a high near 76. Northwest wind around 5 mph.

    High: 76 °F

    Chance
    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Cloudy, with a low around 68. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 60%.

    Low: 68 °F

    Cloudy then
    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm, mainly before noon, then a chance of showers and thunderstorms after noon. High near 82. East wind 5 to 9 mph becoming southwest in the afternoon. Chance of precipitation is 90%.

    High: 82 °F

    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 3am, then a slight chance of showers between 3am and 4am. Mostly cloudy, with a low around 50. West wind 8 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

    Low: 50 °F

    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 57. Breezy, with a northwest wind 18 to 20 mph, with gusts as high as 31 mph.

    High: 57 °F

    Breezy.
    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 42.

    Low: 42 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of showers, mainly between 2pm and 4pm. Cloudy, with a high near 76. Northwest wind around 5 mph.
Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Cloudy, with a low around 68. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 60%.
Thursday
Showers and possibly a thunderstorm, mainly before noon, then a chance of showers and thunderstorms after noon. High near 82. East wind 5 to 9 mph becoming southwest in the afternoon. Chance of precipitation is 90%.
Thursday Night
A chance of showers and thunderstorms before 3am, then a slight chance of showers between 3am and 4am. Mostly cloudy, with a low around 50. West wind 8 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Friday
A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 57. Breezy, with a northwest wind 18 to 20 mph, with gusts as high as 31 mph.
Friday Night
Mostly cloudy, with a low around 43.
Saturday
Sunny, with a high near 62.
Saturday Night
Clear, with a low around 42.
Sunday
Sunny, with a high near 69.
Sunday Night
Partly cloudy, with a low around 48.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 51.
Tuesday
Mostly sunny, with a high near 78.
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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:
11:31 am CDT Oct 14, 2026
Forecast Valid:
1pm CDT Oct 14, 2026-6pm CDT Oct 20, 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