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.

Overcast

31°F

-1°C

Humidity 76%
Wind Speed W 12 mph
Barometer 30.16 in (1022.0 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 2 Feb 1:54 pm CST
Extended Forecast for

Decatur IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 32. West wind 5 to 9 mph, with gusts as high as 15 mph.

    High: 32 °F

    Partly Sunny

  • Tonight

    Tonight: A 20 percent chance of snow after 3am. Cloudy, with a low around 21. Calm wind becoming northeast around 6 mph after midnight.

    Low: 21 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Tuesday

    Tuesday: A 20 percent chance of snow before 9am. Mostly cloudy, with a high near 29. Northeast wind 7 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. 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.

    Low: 26 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 32. West wind 5 to 9 mph, with gusts as high as 15 mph.
Tonight
A 20 percent chance of snow after 3am. Cloudy, with a low around 21. Calm wind becoming northeast around 6 mph after midnight.
Tuesday
A 20 percent chance of snow before 9am. Mostly cloudy, with a high near 29. Northeast wind 7 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. 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.
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.
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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:
12:57 pm CST Feb 2, 2026
Forecast Valid:
2pm CST Feb 2, 2026-6pm CST Feb 8, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation