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

Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

82°F

28°C

Humidity 85%
Wind Speed Calm
Barometer 29.93 in (1013.0 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 19 Jul 8:53 pm CDT
Extended Forecast for

2 Miles S Mehlville MO

Extreme Heat Warning July 19, 09:42pm until July 24, 07:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 19, 09:42pm until July 24, 07:00pm

    NOW until 7:00pm Thu

    Extreme Heat Warning

  • Tonight

    Low: 76 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 96. Heat index values as high as 110. Southwest wind 3 to 8 mph.

    High: 96 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 75. Southwest wind 5 to 7 mph becoming calm. Chance of precipitation is 30%.

    Low: 75 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 107. Calm wind becoming west around 5 mph.

    High: 94 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 76. Light south wind.

    Low: 76 °F

    Mostly Clear

  • Tuesday

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

    High: 97 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 76.

    Low: 76 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 98.

    High: 98 °F

    Hot

Detailed Forecast

Tonight
Partly cloudy, with a low around 76. Light south wind.
Sunday
Mostly sunny, with a high near 96. Heat index values as high as 110. Southwest wind 3 to 8 mph.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 75. Southwest wind 5 to 7 mph becoming calm. Chance of precipitation is 30%.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 94. Heat index values as high as 107. Calm wind becoming west around 5 mph.
Monday Night
Mostly clear, with a low around 76. Light south wind.
Tuesday
Sunny and hot, with a high near 97.
Tuesday Night
Mostly clear, with a low around 76.
Wednesday
Sunny and hot, with a high near 98.
Wednesday Night
Mostly clear, with a low around 77.
Thursday
Sunny and hot, with a high near 99.
Thursday Night
Mostly clear, with a low around 77.
Friday
Sunny and hot, with a high near 98.
Friday Night
Mostly clear, with a low around 77.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 97.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Mehlville MO
 38.47°N 90.32°W (Elev. 499 ft)
Last Update:
7:51 pm CDT Jul 19, 2025
Forecast Valid:
9pm CDT Jul 19, 2025-6pm CDT Jul 26, 2025
 
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