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.

Mostly Cloudy

33°F

1°C

Humidity 82%
Wind Speed W 9 G 21 mph
Barometer 29.66 in (1005.1 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 6 Feb 6:54 am CST
Extended Forecast for

Decatur IL

  • Today

    Today: Increasing clouds, with a high near 39. North northwest wind 13 to 17 mph, with gusts as high as 36 mph.

    High: 39 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 13. Wind chill values between 5 and 10. North wind 7 to 14 mph, with gusts as high as 23 mph.

    Low: 13 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Increasing clouds, with a high near 27. Wind chill values between 4 and 14. North northeast wind around 6 mph becoming light and variable.

    High: 27 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 20. South southeast wind 5 to 10 mph, with gusts as high as 18 mph.

    Low: 20 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 40. South southeast wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 40 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 26. Southeast wind around 6 mph.

    Low: 26 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 50. South southwest wind around 7 mph.

    High: 50 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of rain after noon. Mostly cloudy, with a high near 57.

    High: 57 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Today
Increasing clouds, with a high near 39. North northwest wind 13 to 17 mph, with gusts as high as 36 mph.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 13. Wind chill values between 5 and 10. North wind 7 to 14 mph, with gusts as high as 23 mph.
Saturday
Increasing clouds, with a high near 27. Wind chill values between 4 and 14. North northeast wind around 6 mph becoming light and variable.
Saturday Night
Mostly cloudy, with a low around 20. South southeast wind 5 to 10 mph, with gusts as high as 18 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 40. South southeast wind 7 to 10 mph, with gusts as high as 18 mph.
Sunday Night
Partly cloudy, with a low around 26. Southeast wind around 6 mph.
Monday
Sunny, with a high near 50. South southwest wind around 7 mph.
Monday Night
Mostly clear, with a low around 36.
Tuesday
A 30 percent chance of rain after noon. Mostly cloudy, with a high near 57.
Tuesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 34.
Wednesday
Mostly cloudy, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 27.
Thursday
Mostly cloudy, with a high near 40.
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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:
6:52 am CST Feb 6, 2026
Forecast Valid:
7am CST Feb 6, 2026-6pm CST Feb 12, 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