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

25°F

-4°C

Humidity 50%
Wind Speed NW 12 mph
Barometer 30.13 in (1021.2 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 14 Jan 10:51 pm CST
Extended Forecast for

Florissant MO

  • Tonight

    Tonight: Clear, with a low around 18. Northwest wind 8 to 11 mph, with gusts as high as 23 mph.

    Low: 18 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 35. Northwest wind around 7 mph becoming south in the afternoon.

    High: 35 °F

    Sunny

  • Thursday Night

    Thursday Night: A slight chance of snow between 8pm and midnight. Mostly cloudy, with a low around 30. South wind 6 to 10 mph becoming west after midnight. Chance of precipitation is 20%.

    Low: 30 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 44. West wind 11 to 16 mph, with gusts as high as 28 mph.

    High: 44 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of snow showers. Mostly cloudy, with a low around 21. West wind 13 to 15 mph, with gusts as high as 23 mph.

    Low: 21 °F

    Slight Chance
    Snow Showers

  • Saturday

    Saturday: Partly sunny, with a high near 26.

    High: 26 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 9.

    Low: 9 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 26.

    High: 26 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 17.

    Low: 17 °F

    Partly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 18. Northwest wind 8 to 11 mph, with gusts as high as 23 mph.
Thursday
Sunny, with a high near 35. Northwest wind around 7 mph becoming south in the afternoon.
Thursday Night
A slight chance of snow between 8pm and midnight. Mostly cloudy, with a low around 30. South wind 6 to 10 mph becoming west after midnight. Chance of precipitation is 20%.
Friday
Partly sunny, with a high near 44. West wind 11 to 16 mph, with gusts as high as 28 mph.
Friday Night
A 20 percent chance of snow showers. Mostly cloudy, with a low around 21. West wind 13 to 15 mph, with gusts as high as 23 mph.
Saturday
Partly sunny, with a high near 26.
Saturday Night
Partly cloudy, with a low around 9.
Sunday
Mostly sunny, with a high near 26.
Sunday Night
Partly cloudy, with a low around 17.
M.L.King Day
Mostly sunny, with a high near 26.
Monday Night
Mostly clear, with a low around 12.
Tuesday
Sunny, with a high near 33.
Tuesday Night
Mostly clear, with a low around 22.
Wednesday
Mostly sunny, with a high near 42.
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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:
9:31 pm CST Jan 14, 2026
Forecast Valid:
11pm CST Jan 14, 2026-6pm CST Jan 21, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation