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

Summer Heat In Multiple Spots

A large dome of high pressure is expected to deliver summer heat with humidity in multiple sections of the country to start off the week. Excessive heat warnings and heat advisories are in effect across the south-central Plains, Mid to Lower Mississippi Valley and from the Mid-Atlantic into the Northeast. This includes the cities of New York, Philadelphia, Dallas, Oklahoma City and Kansas City. Read More >

Hazardous Weather Conditions

Current conditions at

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

A Few Clouds

87°F

31°C

Humidity 65%
Wind Speed Vrbl 3 mph
Barometer 30.02 in (1015.2 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 19 Aug 10:51 am CDT
Extended Forecast for

Saint Louis MO

Heat Advisory August 19, 01:00pm until August 19, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93. Heat index values as high as 101. Calm wind.

    Chance
    T-storms

    High: 93 °F

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 76. Light and variable wind.

    Slight Chance
    T-storms then
    Partly Cloudy

    Low: 76 °F

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms. Cloudy, then gradually becoming mostly sunny, with a high near 93. Heat index values as high as 102. Calm wind becoming west 5 to 8 mph in the afternoon.

    Chance
    T-storms

    High: 93 °F

  • Tuesday
    Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 77. South wind 5 to 7 mph.

    Partly Cloudy
    then Slight
    Chance
    T-storms

    Low: 77 °F

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 93. West wind 5 to 7 mph becoming north in the afternoon.

    Chance
    T-storms

    High: 93 °F

  • Wednesday
    Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.

    Chance
    T-storms

    Low: 72 °F

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 84.

    Chance
    T-storms

    High: 84 °F

  • Thursday
    Night

    Thursday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 67.

    Chance
    T-storms

    Low: 67 °F

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.

    Chance
    T-storms

    High: 84 °F

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93. Heat index values as high as 101. Calm wind.
Tonight
A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 76. Light and variable wind.
Tuesday
A 40 percent chance of showers and thunderstorms. Cloudy, then gradually becoming mostly sunny, with a high near 93. Heat index values as high as 102. Calm wind becoming west 5 to 8 mph in the afternoon.
Tuesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 77. South wind 5 to 7 mph.
Wednesday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 93. West wind 5 to 7 mph becoming north in the afternoon.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 84.
Thursday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 67.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.
Friday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65.
Saturday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
Saturday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Sunday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Saint Louis MO
 38.64°N 90.23°W (Elev. 538 ft)
Last Update:
7:43 am CDT Aug 19, 2019
Forecast Valid:
11am CDT Aug 19, 2019-6pm CDT Aug 25, 2019
 
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