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

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Overcast

29°F

-2°C

Humidity 63%
Wind Speed NW 10 G 18 mph
Barometer 30.17 in (1022.3 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 21 Feb 10:54 am CST
Extended Forecast for

Decatur IL

  • Today

    Today: Scattered flurries before noon. Mostly sunny, with a high near 37. West northwest wind 10 to 13 mph, with gusts as high as 18 mph.

    High: 37 °F

    Scattered
    Flurries

  • Tonight

    Tonight: Increasing clouds, with a low around 19. Wind chill values between 5 and 15. Northwest wind 10 to 17 mph, with gusts as high as 26 mph.

    Low: 19 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Partly sunny, with a high near 29. Wind chill values between 4 and 14. Blustery, with a northwest wind 17 to 20 mph, with gusts as high as 32 mph.

    High: 29 °F

    Partly Sunny
    and Blustery

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 16. Wind chill values between 1 and 11. Northwest wind 15 to 18 mph, with gusts as high as 26 mph.

    Low: 16 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 31. North northwest wind 8 to 15 mph, with gusts as high as 25 mph.

    High: 31 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 19. Calm wind becoming south southwest 5 to 7 mph after midnight.

    Low: 19 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 46. South wind 8 to 15 mph, with gusts as high as 25 mph.

    High: 46 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 55.

    High: 55 °F

    Partly Sunny

Detailed Forecast

Today
Scattered flurries before noon. Mostly sunny, with a high near 37. West northwest wind 10 to 13 mph, with gusts as high as 18 mph.
Tonight
Increasing clouds, with a low around 19. Wind chill values between 5 and 15. Northwest wind 10 to 17 mph, with gusts as high as 26 mph.
Sunday
Partly sunny, with a high near 29. Wind chill values between 4 and 14. Blustery, with a northwest wind 17 to 20 mph, with gusts as high as 32 mph.
Sunday Night
Partly cloudy, with a low around 16. Wind chill values between 1 and 11. Northwest wind 15 to 18 mph, with gusts as high as 26 mph.
Monday
Sunny, with a high near 31. North northwest wind 8 to 15 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 19. Calm wind becoming south southwest 5 to 7 mph after midnight.
Tuesday
Partly sunny, with a high near 46. South wind 8 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
Partly sunny, with a high near 55.
Wednesday Night
A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 31.
Thursday
Mostly sunny, with a high near 47.
Thursday Night
Mostly clear, with a low around 28.
Friday
Sunny, with a high near 57.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
Last Update:
10:47 am CST Feb 21, 2026
Forecast Valid:
11am CST Feb 21, 2026-6pm CST Feb 27, 2026
 
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Additional Resources

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