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.

Mostly Cloudy with Haze

85°F

29°C

Humidity 85%
Wind Speed SE 8 mph
Barometer 29.88 in (1011.0 mb)
Dewpoint 80°F (27°C)
Visibility 5.00 mi
Heat Index99°F (37°C)
Last update 26 Jul 5:54 pm CDT
Extended Forecast for

2 Miles W Decatur IL

Heat Advisory July 26, 06:29pm until July 27, 09:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 26, 06:29pm until July 27, 09:00pm

    NOW until 9:00pm Mon

    Heat Advisory

  • Tonight

    Low: 75 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 93. Heat index values as high as 107. South wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 93 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 75. South southwest wind 8 to 11 mph becoming north northwest after midnight. Winds could gust as high as 17 mph.

    Low: 75 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 87. North wind 9 to 13 mph, with gusts as high as 18 mph.

    High: 87 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64. North northeast wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85. North northeast wind 5 to 8 mph.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 64. North northeast wind 5 to 7 mph becoming calm in the evening.

    Low: 64 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 75. South wind 3 to 5 mph.
Monday
Mostly sunny, with a high near 93. Heat index values as high as 107. South wind 6 to 11 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 75. South southwest wind 8 to 11 mph becoming north northwest after midnight. Winds could gust as high as 17 mph.
Tuesday
Mostly sunny, with a high near 87. North wind 9 to 13 mph, with gusts as high as 18 mph.
Tuesday Night
Mostly clear, with a low around 64. North northeast wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday
Sunny, with a high near 85. North northeast wind 5 to 8 mph.
Wednesday Night
Clear, with a low around 64. North northeast wind 5 to 7 mph becoming calm in the evening.
Thursday
Sunny, with a high near 86.
Thursday Night
Partly cloudy, with a low around 67.
Friday
A 40 percent chance of showers. Partly sunny, with a high near 84.
Friday Night
A chance of showers. Mostly cloudy, with a low around 67.
Saturday
A chance of showers. Mostly sunny, with a high near 84.
Saturday Night
Mostly clear, with a low around 66.
Sunday
Sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles W Decatur IL
 39.84°N 88.97°W (Elev. 676 ft)
Last Update:
6:11 pm CDT Jul 26, 2026
Forecast Valid:
6pm CDT Jul 26, 2026-6pm CDT Aug 2, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation