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

78°F

26°C

Humidity 79%
Wind Speed SE 6 mph
Barometer 29.94 in (1013.0 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 26 Jun 1:51 pm CDT
Extended Forecast for

Florissant MO

Flood Watch June 26, 02:51pm until June 26, 07:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch June 26, 02:51pm until June 26, 07:00pm

    NOW until 7:00pm Fri

    Flood Watch

  • This Afternoon

    High: 81 °F

    Showers

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 68. Southeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%.

    Low: 68 °F

    Showers
    Likely then
    Chance
    T-storms

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms before 10am. Partly sunny, with a high near 84. Light and variable wind.

    High: 84 °F

    Slight Chance
    T-storms then
    Partly Sunny

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms, mainly between midnight and 4am. Mostly cloudy, with a low around 73. Southeast wind 3 to 5 mph.

    Low: 73 °F

    Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 94. South wind 7 to 10 mph.

    High: 94 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 77.

    Low: 77 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 78.

    Low: 78 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. High near 81. Southeast wind around 7 mph. Chance of precipitation is 80%.
Tonight
Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 68. Southeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%.
Saturday
A 20 percent chance of showers and thunderstorms before 10am. Partly sunny, with a high near 84. Light and variable wind.
Saturday Night
A 50 percent chance of showers and thunderstorms, mainly between midnight and 4am. Mostly cloudy, with a low around 73. Southeast wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 94. South wind 7 to 10 mph.
Sunday Night
Mostly clear, with a low around 77.
Monday
Sunny and hot, with a high near 97.
Monday Night
Mostly clear, with a low around 78.
Tuesday
Sunny and hot, with a high near 98.
Tuesday Night
Clear, with a low around 78.
Wednesday
Sunny and hot, with a high near 97.
Wednesday Night
Mostly clear, with a low around 79.
Thursday
Sunny and hot, with a high near 98.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Florissant MO
 38.8°N 90.34°W (Elev. 499 ft)
Last Update:
2:47 pm CDT Jun 26, 2026
Forecast Valid:
2pm CDT Jun 26, 2026-6pm CDT Jul 2, 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