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

83°F

28°C

Humidity 77%
Wind Speed S 7 mph
Barometer 29.98 in (1014.0 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 30 Jun 11:54 pm CDT
Extended Forecast for

2 Miles ENE O'Fallon MO

Extreme Heat Warning July 1, 12:17am until July 3, 10:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 1, 12:17am until July 3, 10:00pm

    NOW until 10:00pm Fri

    Extreme Heat Warning

  • Overnight

    Low: 75 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 96. Heat index values as high as 106. South wind 3 to 7 mph.

    High: 96 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 77. Southwest wind 3 to 6 mph.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 4pm. Sunny, with a high near 96. Heat index values as high as 107. Southwest wind 3 to 5 mph.

    High: 96 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

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

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75.

    Low: 75 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Independence Day

    Independence Day: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 95.

    High: 95 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Overnight
Clear, with a low around 75. South wind 5 to 7 mph.
Wednesday
Sunny, with a high near 96. Heat index values as high as 106. South wind 3 to 7 mph.
Wednesday Night
Mostly clear, with a low around 77. Southwest wind 3 to 6 mph.
Thursday
A 20 percent chance of showers and thunderstorms after 4pm. Sunny, with a high near 96. Heat index values as high as 107. Southwest wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 76. Light south wind.
Friday
Sunny, with a high near 96.
Friday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 75.
Independence Day
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 95.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 74.
Sunday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE O'Fallon MO
 38.81°N 90.68°W (Elev. 499 ft)
Last Update:
11:26 pm CDT Jun 30, 2026
Forecast Valid:
12am CDT Jul 1, 2026-6pm CDT Jul 7, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation