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

46°F

8°C

Humidity 66%
Wind Speed W 5 mph
Barometer 30.31 in (1026.6 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 5 Apr 11:51 pm CDT
Extended Forecast for

Florissant MO

  • Overnight

    Overnight: Clear, with a low around 40. West wind around 6 mph.

    Low: 40 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 63. Northwest wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 63 °F

    Sunny

  • Monday Night

    Monday Night: A chance of rain showers after 1am, mixing with snow after 4am. Increasing clouds, with a low around 38. Northeast wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    Low: 38 °F

    Mostly Clear
    then Chance
    Rain/Snow

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 54. East wind around 10 mph.

    High: 54 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 43. East wind around 9 mph.

    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 56.

    Low: 56 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 73. Chance of precipitation is 30%.

    High: 73 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms, then a chance of showers after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.

    Low: 58 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
Clear, with a low around 40. West wind around 6 mph.
Monday
Sunny, with a high near 63. Northwest wind 7 to 11 mph, with gusts as high as 20 mph.
Monday Night
A chance of rain showers after 1am, mixing with snow after 4am. Increasing clouds, with a low around 38. Northeast wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Tuesday
Mostly cloudy, with a high near 54. East wind around 10 mph.
Tuesday Night
Mostly cloudy, with a low around 43. East wind around 9 mph.
Wednesday
Mostly sunny, with a high near 74.
Wednesday Night
Partly cloudy, with a low around 56.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 73. Chance of precipitation is 30%.
Thursday Night
A slight chance of showers and thunderstorms, then a chance of showers after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.
Friday
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 75.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 58.
Saturday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.
Sunday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83.
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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:
12:21 am CDT Apr 6, 2026
Forecast Valid:
12am CDT Apr 6, 2026-6pm CDT Apr 12, 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