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

46°F

8°C

Humidity 89%
Wind Speed W 12 mph
Barometer 29.75 in (1007.3 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 14 Jan 2:51 am CST
Extended Forecast for

Florissant MO

  • Overnight

    Overnight: Mostly cloudy, with a low around 38. West wind 11 to 14 mph, with gusts as high as 26 mph.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Scattered sprinkles and flurries between 8am and 9am. Cloudy through mid morning, then gradual clearing, with a temperature falling to around 30 by 5pm. Breezy, with a northwest wind 15 to 21 mph, with gusts as high as 36 mph.

    High: 39 °F⇓

    Breezy.
    Scattered
    Sprinkles/Flurries
    then
    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Clear, with a low around 18. Northwest wind 8 to 15 mph, with gusts as high as 26 mph.

    Low: 18 °F

    Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 34. Northwest wind around 7 mph becoming southwest in the afternoon.

    High: 34 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 29. South wind 6 to 13 mph becoming west after midnight. Winds could gust as high as 21 mph.

    Low: 29 °F

    Chance Snow

  • Friday

    Friday: Partly sunny, with a high near 44.

    High: 44 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 20.

    Low: 20 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 27.

    High: 27 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 10.

    Low: 10 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 38. West wind 11 to 14 mph, with gusts as high as 26 mph.
Wednesday
Scattered sprinkles and flurries between 8am and 9am. Cloudy through mid morning, then gradual clearing, with a temperature falling to around 30 by 5pm. Breezy, with a northwest wind 15 to 21 mph, with gusts as high as 36 mph.
Wednesday Night
Clear, with a low around 18. Northwest wind 8 to 15 mph, with gusts as high as 26 mph.
Thursday
Increasing clouds, with a high near 34. Northwest wind around 7 mph becoming southwest in the afternoon.
Thursday Night
A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 29. South wind 6 to 13 mph becoming west after midnight. Winds could gust as high as 21 mph.
Friday
Partly sunny, with a high near 44.
Friday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 20.
Saturday
Partly sunny, with a high near 27.
Saturday Night
Partly cloudy, with a low around 10.
Sunday
Mostly sunny, with a high near 26.
Sunday Night
Partly cloudy, with a low around 16.
M.L.King Day
Mostly sunny, with a high near 31.
Monday Night
Mostly clear, with a low around 14.
Tuesday
Mostly sunny, with a high near 35.
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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:
3:16 am CST Jan 14, 2026
Forecast Valid:
3am CST Jan 14, 2026-6pm CST Jan 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation