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.

A Few Clouds

53°F

12°C

Humidity 40%
Wind Speed W 15 G 22 mph
Barometer 30.33 in (1027.3 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 5 Apr 11:51 am CDT
Extended Forecast for

Florissant MO

  • This Afternoon

    This Afternoon: Sunny, with a high near 58. Northwest wind around 13 mph, with gusts as high as 22 mph.

    High: 58 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 41. West wind 5 to 8 mph.

    Low: 41 °F

    Clear

  • Monday

    Monday: Increasing clouds, with a high near 61. Northwest wind 6 to 10 mph.

    High: 61 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 37. North wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 37 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 53. East wind around 9 mph.

    High: 53 °F

    Mostly Cloudy

  • Tuesday Night

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

    Low: 43 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 58. Northwest wind around 13 mph, with gusts as high as 22 mph.
Tonight
Clear, with a low around 41. West wind 5 to 8 mph.
Monday
Increasing clouds, with a high near 61. Northwest wind 6 to 10 mph.
Monday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 37. North wind 8 to 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly cloudy, with a high near 53. East wind around 9 mph.
Tuesday Night
Mostly cloudy, with a low around 43.
Wednesday
Mostly sunny, with a high near 74.
Wednesday Night
Partly cloudy, with a low around 55.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 77.
Thursday Night
A slight chance of showers and thunderstorms, then a chance of showers after 1am. Mostly cloudy, with a low around 56. Chance of precipitation is 30%.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 77.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 58.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 77.
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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:
9:51 am CDT Apr 5, 2026
Forecast Valid:
12pm CDT Apr 5, 2026-6pm CDT Apr 11, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation