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

60°F

16°C

Humidity 27%
Wind Speed NW 15 G 23 mph
Barometer 29.96 in (1014.4 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 13 Mar 1:51 pm CDT
Extended Forecast for

Florissant MO

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 61. West wind 13 to 16 mph, with gusts as high as 25 mph.

    High: 61 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 38. Northwest wind 5 to 7 mph becoming light and variable.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 63. East wind 7 to 14 mph, with gusts as high as 22 mph.

    High: 63 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 55. Southeast wind 10 to 14 mph, with gusts as high as 24 mph.

    Low: 55 °F

    Mostly Cloudy

  • Sunday

    Sunday: Rain, mainly between 1pm and 4pm, then showers and possibly a thunderstorm after 4pm. High near 70. Breezy, with a south wind 18 to 22 mph, with gusts as high as 39 mph. Chance of precipitation is 90%.

    High: 70 °F

    Breezy.
    Chance Rain
    then Showers

  • Sunday Night

    Sunday Night: Rain before 10pm, then snow, possibly mixed with rain between 10pm and 1am, then a chance of snow after 1am. Some thunder is also possible. Low around 22. Breezy. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    Low: 22 °F

    Rain/Snow and
    Breezy

  • Monday

    Monday: A 30 percent chance of snow before 1pm. Mostly cloudy, with a high near 29. Blustery.

    High: 29 °F

    Chance Snow
    and Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around 14. Blustery.

    Low: 14 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 36.

    High: 36 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 61. West wind 13 to 16 mph, with gusts as high as 25 mph.
Tonight
Partly cloudy, with a low around 38. Northwest wind 5 to 7 mph becoming light and variable.
Saturday
Mostly sunny, with a high near 63. East wind 7 to 14 mph, with gusts as high as 22 mph.
Saturday Night
Mostly cloudy, with a low around 55. Southeast wind 10 to 14 mph, with gusts as high as 24 mph.
Sunday
Rain, mainly between 1pm and 4pm, then showers and possibly a thunderstorm after 4pm. High near 70. Breezy, with a south wind 18 to 22 mph, with gusts as high as 39 mph. Chance of precipitation is 90%.
Sunday Night
Rain before 10pm, then snow, possibly mixed with rain between 10pm and 1am, then a chance of snow after 1am. Some thunder is also possible. Low around 22. Breezy. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Monday
A 30 percent chance of snow before 1pm. Mostly cloudy, with a high near 29. Blustery.
Monday Night
Mostly clear, with a low around 14. Blustery.
Tuesday
Sunny, with a high near 36.
Tuesday Night
A slight chance of snow before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 30. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 64.
Wednesday Night
Mostly clear, with a low around 41.
Thursday
Mostly sunny, with a high near 69.
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ABOUT THIS FORECAST

 
Point Forecast:
Florissant MO
 38.8°N 90.31°W (Elev. 525 ft)
Last Update:
1:21 pm CDT Mar 13, 2026
Forecast Valid:
2pm CDT Mar 13, 2026-6pm CDT Mar 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation