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

76°F

24°C

Humidity 91%
Wind Speed S 5 mph
Barometer 29.95 in (1013.3 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index76°F (24°C)
Last update 15 Jul 11:54 pm CDT
Extended Forecast for

Decatur Airport IL

  • Overnight

    Overnight: Partly cloudy, with a low around 71. South wind 3 to 5 mph.

    Low: 71 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 90. Southwest wind 6 to 11 mph.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72. Southwest wind around 8 mph.

    Low: 72 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 84. West northwest wind 7 to 10 mph, with gusts as high as 15 mph.

    High: 84 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 66. Northeast wind around 8 mph.

    Low: 66 °F

    Chance
    T-storms

  • Friday

    Friday: Partly sunny, with a high near 82. East wind around 7 mph.

    High: 82 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 71. South southeast wind around 6 mph.

    Low: 71 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.

    High: 88 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.

    Low: 73 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 71. South wind 3 to 5 mph.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 90. Southwest wind 6 to 11 mph.
Wednesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72. Southwest wind around 8 mph.
Thursday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 84. West northwest wind 7 to 10 mph, with gusts as high as 15 mph.
Thursday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 66. Northeast wind around 8 mph.
Friday
Partly sunny, with a high near 82. East wind around 7 mph.
Friday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 71. South southeast wind around 6 mph.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
Saturday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.
Sunday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 88.
Monday Night
Partly cloudy, with a low around 73.
Tuesday
Mostly sunny, with a high near 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur Airport IL
 39.84°N 88.88°W (Elev. 650 ft)
Last Update:
5:56 pm CDT Jul 15, 2025
Forecast Valid:
12am CDT Jul 16, 2025-6pm CDT Jul 22, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation