Severe Thunderstorms in the Ohio Valley and Mid-Atlantic; Heat Continuing in the Central U.S.

Widespread strong to severe thunderstorms are expected from the Upper Ohio Valley into the Mid-Atlantic through Friday, with damaging winds as the primary threat. Dangerous heat will continue from the South-Central U.S. to the Midwest, Ohio/Tennessee valleys, and Mid-Atlantic. Widespread Major to Extreme Heat Risk is forecast into the weekend and will confine to the South-Central U.S. by Labor Day Read More >

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

77°F

25°C

Humidity 82%
Wind Speed S 3 mph
Barometer 29.93 in (1013.2 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 4 Sep 2:53 am CDT
Extended Forecast for

Fairmont City IL

Extreme Heat Warning September 4, 03:12am until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 4, 03:12am until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • Overnight

    Low: 78 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 101. Heat index values as high as 108. Calm wind becoming west around 6 mph in the morning.

    High: 101 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 77. Light south wind.

    Low: 77 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 101. Heat index values as high as 108. Calm wind becoming northwest around 6 mph in the morning.

    High: 101 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 75. North wind around 6 mph becoming calm  in the evening.

    Low: 75 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Sunny, with a high near 93.

    High: 93 °F

    Sunny

Detailed Forecast

Overnight
Clear, with a low around 78. Light south wind.
Friday
Sunny and hot, with a high near 101. Heat index values as high as 108. Calm wind becoming west around 6 mph in the morning.
Friday Night
Mostly clear, with a low around 77. Light south wind.
Saturday
Mostly sunny and hot, with a high near 101. Heat index values as high as 108. Calm wind becoming northwest around 6 mph in the morning.
Saturday Night
Mostly clear, with a low around 75. North wind around 6 mph becoming calm in the evening.
Sunday
Sunny, with a high near 95.
Sunday Night
Partly cloudy, with a low around 68.
Labor Day
Sunny, with a high near 93.
Monday Night
Mostly clear, with a low around 69.
Tuesday
Sunny and hot, with a high near 99.
Tuesday Night
Mostly clear, with a low around 77.
Wednesday
Sunny and hot, with a high near 101.
Wednesday Night
A 20 percent chance of showers. Mostly clear, with a low around 77.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Fairmont City IL
 38.66°N 90.09°W (Elev. 410 ft)
1:26 am CDT Sep 4, 2026
3am CDT Sep 4, 2026-6pm CDT Sep 10, 2026
 
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