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

Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

81°F

27°C

Humidity 79%
Wind Speed SW 14 mph
Barometer 30.05 in (1016.7 mb)
Dewpoint 74°F (23°C)
Visibility 7.00 mi
Heat Index86°F (30°C)
Last update 30 Jun 8:54 am CDT
Extended Forecast for

Elwin IL

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

    NOW until 12:00am Fri

    Extreme Heat Warning

  • Today

    High: 93 °F

    Mostly Sunny

  • Tonight

    Tonight: Clear, with a low around 75. South wind 8 to 10 mph, with gusts as high as 18 mph.

    Low: 75 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94. Heat index values as high as 106. South southwest wind 6 to 11 mph, with gusts as high as 18 mph.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 75. South wind 7 to 11 mph, with gusts as high as 18 mph.

    Low: 75 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 94. South southwest wind 7 to 10 mph, with gusts as high as 15 mph.

    High: 94 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 74. South wind 5 to 8 mph.

    Low: 74 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. Southwest wind 6 to 8 mph.

    High: 92 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

Detailed Forecast

Today
Mostly sunny, with a high near 93. Heat index values as high as 105. Southwest wind 9 to 14 mph, with gusts as high as 24 mph.
Tonight
Clear, with a low around 75. South wind 8 to 10 mph, with gusts as high as 18 mph.
Wednesday
Sunny, with a high near 94. Heat index values as high as 106. South southwest wind 6 to 11 mph, with gusts as high as 18 mph.
Wednesday Night
Clear, with a low around 75. South wind 7 to 11 mph, with gusts as high as 18 mph.
Thursday
Sunny, with a high near 94. South southwest wind 7 to 10 mph, with gusts as high as 15 mph.
Thursday Night
Partly cloudy, with a low around 74. South wind 5 to 8 mph.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. Southwest wind 6 to 8 mph.
Friday Night
Partly cloudy, with a low around 72.
Independence Day
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91.
Saturday Night
A 30 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 70.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Sunday Night
Partly cloudy, with a low around 69.
Monday
Mostly sunny, with a high near 86.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Elwin IL
 39.8°N 88.94°W (Elev. 699 ft)
Last Update:
7:36 am CDT Jun 30, 2026
Forecast Valid:
9am CDT Jun 30, 2026-6pm CDT Jul 6, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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