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.

Fair

11°F

-12°C

Humidity 88%
Wind Speed SW 6 mph
Barometer 30.25 in (1025.6 mb)
Dewpoint 8°F (-13°C)
Visibility 9.00 mi
Wind Chill1°F (-17°C)
Last update 5 Feb 3:54 am CST
Extended Forecast for

Decatur IL

  • Today

    Today: A chance of flurries between noon and 3pm. Mostly cloudy, with a high near 31. Wind chill values between 4 and 14. South southwest wind 5 to 10 mph, with gusts as high as 17 mph.

    High: 31 °F

    Chance
    Flurries

  • Tonight

    Tonight: Mostly cloudy, with a low around 24. South wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 15 mph.

    Low: 24 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 40. West wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 28 mph.

    High: 40 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 15. North wind 7 to 13 mph, with gusts as high as 24 mph.

    Low: 15 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Mostly sunny, with a high near 28. North northeast wind around 6 mph becoming southeast in the afternoon.

    High: 28 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 20. South southeast wind 6 to 10 mph, with gusts as high as 16 mph.

    Low: 20 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 43. South wind 6 to 10 mph, with gusts as high as 16 mph.

    High: 43 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 26.

    Low: 26 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

Detailed Forecast

Today
A chance of flurries between noon and 3pm. Mostly cloudy, with a high near 31. Wind chill values between 4 and 14. South southwest wind 5 to 10 mph, with gusts as high as 17 mph.
Tonight
Mostly cloudy, with a low around 24. South wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 15 mph.
Friday
Mostly cloudy, with a high near 40. West wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 28 mph.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 15. North wind 7 to 13 mph, with gusts as high as 24 mph.
Saturday
Mostly sunny, with a high near 28. North northeast wind around 6 mph becoming southeast in the afternoon.
Saturday Night
Mostly cloudy, with a low around 20. South southeast wind 6 to 10 mph, with gusts as high as 16 mph.
Sunday
Mostly sunny, with a high near 43. South wind 6 to 10 mph, with gusts as high as 16 mph.
Sunday Night
Mostly clear, with a low around 26.
Monday
Sunny, with a high near 51.
Monday Night
Mostly clear, with a low around 36.
Tuesday
Partly sunny, with a high near 56.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 36.
Wednesday
A chance of rain. Cloudy, with a high near 49.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
Last Update:
3:37 am CST Feb 5, 2026
Forecast Valid:
4am CST Feb 5, 2026-6pm CST Feb 11, 2026
 
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Additional Resources

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