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

Hazardous Weather Conditions

Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fair

87°F

31°C

Humidity 65%
Wind Speed S 6 mph
Barometer 30.05 in (1016.6 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 18 Aug 9:54 am CDT
Extended Forecast for

2 Miles WSW Dardenne Prairie MO

Heat Advisory August 18, 10:34am until August 18, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 18, 10:34am until August 18, 08:00pm

    NOW until 8:00pm Mon

    Heat Advisory

  • Today

    High: 95 °F

    Sunny then
    Slight Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 73. Light south wind.

    Low: 73 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 7am. Mostly sunny, with a high near 93. Heat index values as high as 105. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 93 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 72. Calm wind. Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 87. North wind 3 to 8 mph. Chance of precipitation is 20%.

    High: 87 °F

    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 3pm. Sunny, with a high near 95. Heat index values as high as 107. Calm wind becoming south around 6 mph in the afternoon.
Tonight
A 20 percent chance of showers and thunderstorms after 3am. Partly cloudy, with a low around 73. Light south wind.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly after 7am. Mostly sunny, with a high near 93. Heat index values as high as 105. Calm wind becoming northwest around 5 mph in the afternoon.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 72. Calm wind. Chance of precipitation is 30%.
Wednesday
A slight chance of showers, with thunderstorms also possible after 10am. Mostly sunny, with a high near 87. North wind 3 to 8 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around 65.
Thursday
Sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 65.
Friday
Sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 65.
Saturday
Mostly sunny, with a high near 86.
Saturday Night
Mostly clear, with a low around 61.
Sunday
Sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Dardenne Prairie MO
 38.74°N 90.77°W (Elev. 545 ft)
Last Update:
10:21 am CDT Aug 18, 2025
Forecast Valid:
10am CDT Aug 18, 2025-6pm CDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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