National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Overcast

69°F

21°C

Humidity 61%
Wind Speed S 7 mph
Barometer 30.25 in (1024.1 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 11 Apr 2:51 pm CDT
Extended Forecast for

Florissant MO

  • This Afternoon

    This Afternoon: A 20 percent chance of showers. Mostly sunny, with a high near 74. Southeast wind around 10 mph.

    High: 74 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Partly cloudy, with a low around 63. Southeast wind around 9 mph.

    Low: 63 °F

    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers, mainly after 4pm. Increasing clouds, with a high near 82. South wind 9 to 17 mph, with gusts as high as 30 mph.

    High: 82 °F

    Mostly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 66. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

    Low: 66 °F

    Showers
    Likely

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 86. South wind 11 to 15 mph, with gusts as high as 25 mph.

    High: 86 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.

    Low: 68 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 80. Chance of precipitation is 70%.

    High: 80 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
A 20 percent chance of showers. Mostly sunny, with a high near 74. Southeast wind around 10 mph.
Tonight
Partly cloudy, with a low around 63. Southeast wind around 9 mph.
Sunday
A 30 percent chance of showers, mainly after 4pm. Increasing clouds, with a high near 82. South wind 9 to 17 mph, with gusts as high as 30 mph.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 66. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Monday
A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 86. South wind 11 to 15 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 69.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Wednesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 80. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Chance of precipitation is 70%.
Thursday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Thursday Night
A 20 percent chance of showers. Mostly clear, with a low around 63.
Friday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.
Saturday
A 50 percent chance of showers and thunderstorms. Partly 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:
2:46 pm CDT Apr 11, 2026
Forecast Valid:
3pm CDT Apr 11, 2026-6pm CDT Apr 18, 2026
 
Forecast Discussion
 
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Additional Resources

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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