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.

Partly Cloudy

22°F

-6°C

Humidity 100%
Wind Speed Calm
Barometer 30.19 in (1023.2 mb)
Dewpoint 22°F (-6°C)
Visibility 9.00 mi
Last update 2 Feb 10:54 pm CST
Extended Forecast for

Decatur IL

  • Tonight

    Tonight: A 20 percent chance of snow after 3am. Cloudy, with a low around 22. Calm wind becoming east northeast around 5 mph after midnight.

    Low: 22 °F

    Slight Chance
    Snow

  • Tuesday

    Tuesday: A 20 percent chance of snow before 9am. Mostly cloudy, with a high near 29. Northeast wind 5 to 10 mph, with gusts as high as 16 mph.

    High: 29 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 11. North northeast wind 3 to 6 mph.

    Low: 11 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 25. Wind chill values between 5 and 15. North wind 3 to 6 mph.

    High: 25 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 10. West wind 3 to 5 mph.

    Low: 10 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 32. South southwest wind 5 to 10 mph, with gusts as high as 16 mph.

    High: 32 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 26. South wind around 11 mph becoming west after midnight. Winds could gust as high as 20 mph.

    Low: 26 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 17.

    Low: 17 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of snow after 3am. Cloudy, with a low around 22. Calm wind becoming east northeast around 5 mph after midnight.
Tuesday
A 20 percent chance of snow before 9am. Mostly cloudy, with a high near 29. Northeast wind 5 to 10 mph, with gusts as high as 16 mph.
Tuesday Night
Partly cloudy, with a low around 11. North northeast wind 3 to 6 mph.
Wednesday
Partly sunny, with a high near 25. Wind chill values between 5 and 15. North wind 3 to 6 mph.
Wednesday Night
Partly cloudy, with a low around 10. West wind 3 to 5 mph.
Thursday
Partly sunny, with a high near 32. South southwest wind 5 to 10 mph, with gusts as high as 16 mph.
Thursday Night
Partly cloudy, with a low around 26. South wind around 11 mph becoming west after midnight. Winds could gust as high as 20 mph.
Friday
Partly sunny, with a high near 39.
Friday Night
Partly cloudy, with a low around 17.
Saturday
Mostly sunny, with a high near 30.
Saturday Night
Partly cloudy, with a low around 17.
Sunday
Mostly sunny, with a high near 35.
Sunday Night
Partly cloudy, with a low around 20.
Monday
Mostly sunny, with a high near 40.
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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:
11:37 pm CST Feb 2, 2026
Forecast Valid:
11pm CST Feb 2, 2026-6pm CST Feb 9, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation