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

73°F

23°C

Humidity 34%
Wind Speed S 3 mph
Barometer 30.06 in (1016.7 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 9 Oct 10:51 pm CDT
Extended Forecast for

Florissant MO

  • Tonight

    Tonight: Mostly clear, with a low around 58. Southeast wind around 6 mph.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly cloudy, with a high near 82. Southeast wind 5 to 7 mph.

    High: 82 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 61. Southeast wind 5 to 7 mph becoming calm after midnight.

    Low: 61 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 86. Calm wind becoming west around 5 mph.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 67. Calm wind becoming southwest around 6 mph after midnight.

    Low: 67 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 66.

    Low: 66 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 58. Southeast wind around 6 mph.
Saturday
Mostly cloudy, with a high near 82. Southeast wind 5 to 7 mph.
Saturday Night
Mostly cloudy, with a low around 61. Southeast wind 5 to 7 mph becoming calm after midnight.
Sunday
Sunny, with a high near 86. Calm wind becoming west around 5 mph.
Sunday Night
Mostly clear, with a low around 67. Calm wind becoming southwest around 6 mph after midnight.
Columbus Day
Sunny, with a high near 94.
Monday Night
Mostly clear, with a low around 73.
Tuesday
Sunny, with a high near 90.
Tuesday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 66.
Wednesday
Showers likely, with thunderstorms also possible after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Thursday
Showers and thunderstorms likely. Partly sunny, with a high near 79. Chance of precipitation is 60%.
Thursday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 58.
Friday
A 20 percent chance of showers. Partly sunny, with a high near 71.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Florissant MO
 38.78°N 90.34°W (Elev. 528 ft)
Last Update:
7:46 pm CDT Oct 9, 2026
Forecast Valid:
11pm CDT Oct 9, 2026-6pm CDT Oct 16, 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