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

Dangerous Heat in the East; Critical Fire Weather in the Southwest

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Heat is likely to continue across the eastern U.S. through the Independence Day holiday weekend. Critical fire weather conditions will continue today and likely Tuesday across portions of the Four Corners and northern High Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Mount Carmel, Mount Carmel Municipal Airport (KAJG)

Lat: 38.61°NLon: 87.73°WElev: 423ft.

Mostly Cloudy

91°F

33°C

Humidity 64%
Wind Speed S 12 mph
Barometer 30.02 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index105°F (41°C)
Last update 29 Jun 2:55 pm CDT
Extended Forecast for

Sumner IL

Heat Advisory June 29, 03:07pm until July 3, 12:00am
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 29, 03:07pm until July 3, 12:00am

    NOW until 12:00am Fri

    Heat Advisory

  • This Afternoon

    High: 92 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 75. South wind 5 to 9 mph, with gusts as high as 17 mph.

    Low: 75 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 94. Heat index values as high as 109. South southwest wind 6 to 10 mph, with gusts as high as 15 mph.

    High: 94 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 74. South southwest wind 3 to 8 mph. Winds could gust as high as 15 mph.

    Low: 74 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 95. South southwest wind 3 to 8 mph.

    High: 95 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 76. South wind 3 to 5 mph.

    Low: 76 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 94. Calm wind becoming south southwest around 6 mph in the morning.

    High: 94 °F

    Sunny

  • Thursday Night

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

    Low: 76 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 92. Heat index values as high as 106. South wind around 11 mph, with gusts as high as 17 mph.
Tonight
Partly cloudy, with a low around 75. South wind 5 to 9 mph, with gusts as high as 17 mph.
Tuesday
Sunny, with a high near 94. Heat index values as high as 109. South southwest wind 6 to 10 mph, with gusts as high as 15 mph.
Tuesday Night
Clear, with a low around 74. South southwest wind 3 to 8 mph. Winds could gust as high as 15 mph.
Wednesday
Sunny and hot, with a high near 95. South southwest wind 3 to 8 mph.
Wednesday Night
Clear, with a low around 76. South wind 3 to 5 mph.
Thursday
Sunny, with a high near 94. Calm wind becoming south southwest around 6 mph in the morning.
Thursday Night
Mostly clear, with a low around 76.
Friday
A 40 percent chance of showers and thunderstorms. Sunny, with a high near 91.
Friday Night
Mostly clear, with a low around 74.
Independence Day
A chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Saturday Night
Partly cloudy, with a low around 74.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sumner IL
 38.72°N 87.87°W (Elev. 479 ft)
Last Update:
2:00 pm CDT Jun 29, 2026
Forecast Valid:
3pm CDT Jun 29, 2026-6pm CDT Jul 5, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation