Three Weather Areas of Concern Today

Potential Tropical Cyclone Three will gradually approach the northern Gulf Coast with heavy rain and potential flooding. Meanwhile, a sharp cold front will produce severe thunderstorms with significant winds, hail, tornadoes and possible flooding across the Ohio Valley. Finally, a large dome of high pressure will continue the major heat wave over the West, extending into the central Plains. Read More >

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

94°F

34°C

Humidity 48%
Wind Speed SW 13 mph
Barometer 29.86 in (1009.5 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 18 Jun 7:51 pm CDT
Extended Forecast for

Florissant MO

Heat Advisory until June 20, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until June 20, 07:00pm

    NOW until
    7:00pm Sun

    Heat Advisory

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 4am.  Partly cloudy, with a low around 78. Southwest wind 7 to 9 mph.

    Partly Cloudy
    then Slight
    Chance
    T-storms

    Low: 78 °F

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms, mainly after 4pm.  Mostly sunny and hot, with a high near 98. Heat index values as high as 103. Southwest wind 7 to 10 mph.

    Chance
    T-storms

    High: 98 °F

  • Saturday
    Night

    Saturday Night: A 40 percent chance of showers and thunderstorms before 11pm. Some of the storms could produce heavy rainfall.  Partly cloudy, with a low around 75. South wind 3 to 7 mph.

    Heavy Rain
    then Partly
    Cloudy

    Low: 75 °F

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 98. Southwest wind 5 to 11 mph, with gusts as high as 22 mph.

    Hot

    High: 98 °F

  • Sunday
    Night

    Sunday Night: A 40 percent chance of showers and thunderstorms, mainly after 2am.  Partly cloudy, with a low around 74. Southwest wind around 10 mph, with gusts as high as 20 mph.

    Chance
    T-storms

    Low: 74 °F

  • Monday

    Monday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 81.

    Chance
    T-storms

    High: 81 °F

  • Monday
    Night

    Monday Night: A 40 percent chance of showers and thunderstorms before 8pm.  Partly cloudy, with a low around 58.

    Chance
    T-storms then
    Mostly Clear

    Low: 58 °F

  • Tuesday

    Tuesday: Sunny, with a high near 79.

    Sunny

    High: 79 °F

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 78. Southwest wind 7 to 9 mph.
Saturday
A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 103. Southwest wind 7 to 10 mph.
Saturday Night
A 40 percent chance of showers and thunderstorms before 11pm. Some of the storms could produce heavy rainfall. Partly cloudy, with a low around 75. South wind 3 to 7 mph.
Sunday
Mostly sunny and hot, with a high near 98. Southwest wind 5 to 11 mph, with gusts as high as 22 mph.
Sunday Night
A 40 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 74. Southwest wind around 10 mph, with gusts as high as 20 mph.
Monday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 81.
Monday Night
A 40 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 58.
Tuesday
Sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Sunny, with a high near 86.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Thursday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Thursday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Friday
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Click Map For Forecast
Point Forecast:
Florissant MO
 38.8°N 90.34°W (Elev. 499 ft)
7:11 pm CDT Jun 18, 2021
8pm CDT Jun 18, 2021-6pm CDT Jun 25, 2021
 
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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