Notice of NWS' New Version of Forecast
A new version of Forecast is coming soon!
Click here to visit the new site for details.

Severe Thunderstorms With Heavy Rain from Great Lakes to Mid-Atlantic; Excessive Heat For Central/Southern U.S. to Mid-Atlantic

Severe thunderstorms are possible today into Sunday across the upper Great Lakes region to the northern Mid-Atlantic. Damaging winds, large hail, and flooding will be the primary threats with these storms. Meanwhile, dangerous heat will continue through Sunday across the central and southern U.S. into the Mid-Atlantic. Read More >

Current conditions at

St. Louis, Lambert-St. Louis International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

A Few Clouds

107°F

42°C

Humidity 27%
Wind Speed W 14 mph
Barometer 29.77 in (1006.3 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index113°F (45°C)
Last update 22 Jul 3:51 pm CDT
Extended Forecast for

Saint Louis MO

Excessive Heat Warning until July 23, 08:00pm
Click here for hazard details and duration
Excessive Heat Warning
  •  
    Excessive Heat Warning until July 23, 08:00pm

    NOW until
    8:00pm Sun

    Excessive Heat Warning

  • This
    Afternoon

    This Afternoon: Sunny and hot, with a high near 105. Heat index values as high as 115. Southwest wind around 9 mph.

    Hot

    High: 105 °F

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 10pm.  Partly cloudy, with a low around 80. Southwest wind 5 to 8 mph.

    Chance
    T-storms

    Low: 80 °F

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms before 1pm.  Partly sunny and hot, with a high near 98. Heat index values as high as 102. Light northwest wind.

    Slight Chance
    T-storms

    High: 98 °F

  • Sunday
    Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before 1am.  Partly cloudy, with a low around 73. Northwest wind 3 to 5 mph.

    Slight Chance
    T-storms

    Low: 73 °F

  • Monday

    Monday: Sunny, with a high near 92. North wind 3 to 5 mph.

    Sunny

    High: 92 °F

  • Monday
    Night

    Monday Night: Mostly clear, with a low around 71.

    Mostly Clear

    Low: 71 °F

  • Tuesday

    Tuesday: Sunny, with a high near 94.

    Sunny

    High: 94 °F

  • Tuesday
    Night

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

    Mostly Clear

    Low: 74 °F

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 105. Heat index values as high as 115. Southwest wind around 9 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 10pm. Partly cloudy, with a low around 80. Southwest wind 5 to 8 mph.
Sunday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny and hot, with a high near 98. Heat index values as high as 102. Light northwest wind.
Sunday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 73. Northwest wind 3 to 5 mph.
Monday
Sunny, with a high near 92. North wind 3 to 5 mph.
Monday Night
Mostly clear, with a low around 71.
Tuesday
Sunny, with a high near 94.
Tuesday Night
Mostly clear, with a low around 74.
Wednesday
Mostly sunny and hot, with a high near 98.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 77.
Thursday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 94.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 90.
Friday Night
Partly cloudy, with a low around 70.
Saturday
Sunny, with a high near 90.
Click Map For Forecast
Point Forecast:
Saint Louis MO
 38.62°N 90.23°W (Elev. 489 ft)
3:44 pm CDT Jul 22, 2017
4pm CDT Jul 22, 2017-6pm CDT Jul 29, 2017
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database