Showers and Storms continue across the East; Heat, Critical Fire Weather, Drought, and Poor Air Quality continues in the West

A series of fronts will focus locally heavy showers and storms across portions of the central and eastern U.S. through the end of the workweek. Dangerous to extreme heat continues across the Southwest U.S., eventually spreading eastward over the weekend into early next week. Elevated fire weather conditions continue across the Great Basin, with degraded air quality lingering across the Northwest. Read More >

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Mostly Cloudy

87°F

31°C

Humidity 48%
Wind Speed Vrbl 6 mph
Barometer 30.07 in (1016.9 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 5 Aug 12:51 pm CDT
Extended Forecast for

Florissant MO

Flood Watch August 5, 10:00pm until August 6, 10:00am
Click here for hazard details and duration
Flood Watch
  • This Afternoon

    This Afternoon: A slight chance of showers and thunderstorms before 2pm, then a slight chance of showers and thunderstorms after 4pm.  Partly sunny, with a high near 91. South wind around 7 mph.  Chance of precipitation is 20%.

    High: 91 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5am.  Low around 73. South wind around 6 mph becoming light and variable.  Chance of precipitation is 80%.

    Low: 73 °F

    Slight Chance
    T-storms then
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms, mainly before 1pm.  High near 84. Southwest wind 3 to 6 mph.  Chance of precipitation is 80%.

    High: 84 °F

    T-storms then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms, mainly after 10pm.  Partly cloudy, then becoming cloudy toward daybreak, with a low around 72. East wind 3 to 5 mph.

    Low: 72 °F

    Chance
    T-storms

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 88. Southwest wind 5 to 7 mph.

    High: 88 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 73.

    Low: 73 °F

    Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 93.

    High: 93 °F

    Sunny

Detailed Forecast

This Afternoon
A slight chance of showers and thunderstorms before 2pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 91. South wind around 7 mph. Chance of precipitation is 20%.
Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5am. Low around 73. South wind around 6 mph becoming light and variable. Chance of precipitation is 80%.
Thursday
Showers and thunderstorms, mainly before 1pm. High near 84. Southwest wind 3 to 6 mph. Chance of precipitation is 80%.
Thursday Night
A 50 percent chance of showers and thunderstorms, mainly after 10pm. Partly cloudy, then becoming cloudy toward daybreak, with a low around 72. East wind 3 to 5 mph.
Friday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 88. Southwest wind 5 to 7 mph.
Friday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Saturday
Mostly sunny, with a high near 91.
Saturday Night
Mostly clear, with a low around 74.
Sunday
Sunny, with a high near 93.
Sunday Night
Mostly clear, with a low around 77.
Monday
Sunny, with a high near 95.
Monday Night
Mostly clear, with a low around 77.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
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ABOUT THIS FORECAST

 
Point Forecast:
Florissant MO
 38.78°N 90.34°W (Elev. 528 ft)
11:31 am CDT Aug 5, 2026
1pm CDT Aug 5, 2026-6pm CDT Aug 11, 2026
 
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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