Dangerous Heat Builds and Expands; Critical Fire Weather for the Southwest; Severe Thunderstorms for Plains and Midwest

Dangerous to record breaking heat will build across the center of the nation and slowly build eastward this week. Wildfire conditions remain critical for the Southwest and portions of the Great Basin through Monday. For the northern Plains and upper Midwest, severe thunderstorms with the potential for large to very large hail and severe winds are the primary hazards. Read More >

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fog/Mist

73°F

23°C

Humidity 96%
Wind Speed S 3 mph
Barometer 29.95 in (1013.6 mb)
Dewpoint 72°F (22°C)
Visibility 6.00 mi
Last update 29 Jun 3:54 am CDT
Extended Forecast for

3 Miles SW Dewitt IL

Heat Advisory June 29, 11:00am until July 3, 12:00am
Click here for hazard details and duration
Heat Advisory
  • Today

    Today: Partly sunny, with a high near 92. Heat index values as high as 105. South wind 8 to 17 mph, with gusts as high as 24 mph.

    High: 92 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 75. South wind 10 to 16 mph, with gusts as high as 23 mph.

    Low: 75 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 93. Heat index values as high as 106. Southwest wind 10 to 16 mph, with gusts as high as 23 mph.

    High: 93 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 75. South southwest wind 9 to 15 mph, with gusts as high as 21 mph.

    Low: 75 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94. South southwest wind 9 to 15 mph, with gusts as high as 20 mph.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 75. South southwest wind 8 to 13 mph, with gusts as high as 20 mph.

    Low: 75 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 93. South southwest wind 8 to 15 mph, with gusts as high as 20 mph.

    High: 93 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms.  Mostly sunny, with a high near 90.

    High: 90 °F

    Chance
    T-storms

Detailed Forecast

Today
Partly sunny, with a high near 92. Heat index values as high as 105. South wind 8 to 17 mph, with gusts as high as 24 mph.
Tonight
Partly cloudy, with a low around 75. South wind 10 to 16 mph, with gusts as high as 23 mph.
Tuesday
Mostly sunny, with a high near 93. Heat index values as high as 106. Southwest wind 10 to 16 mph, with gusts as high as 23 mph.
Tuesday Night
Clear, with a low around 75. South southwest wind 9 to 15 mph, with gusts as high as 21 mph.
Wednesday
Sunny, with a high near 94. South southwest wind 9 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
Clear, with a low around 75. South southwest wind 8 to 13 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 93. South southwest wind 8 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 74.
Friday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Friday Night
Partly cloudy, with a low around 73.
Independence Day
A chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Saturday Night
Partly cloudy, with a low around 71.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Dewitt IL
 40.17°N 88.78°W (Elev. 699 ft)
2:46 am CDT Jun 29, 2026
4am CDT Jun 29, 2026-6pm CDT Jul 5, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database