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.

Fair

13°F

-11°C

Humidity 61%
Wind Speed N 6 mph
Barometer 30.28 in (1026.6 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Wind Chill4°F (-16°C)
Last update 29 Jan 1:54 am CST
Extended Forecast for

Decatur IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 0. Light north wind.

    Low: 0 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 17. Wind chill values between -8 and 2. North wind 3 to 5 mph.

    High: 17 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A chance of flurries after midnight. Mostly cloudy, with a low around -2. Wind chill values between -6 and -11. North wind 3 to 5 mph.

    Low: -2 °F

    Chance
    Flurries

  • Friday

    Friday: Mostly sunny, with a high near 14. Wind chill values between -2 and -12. North wind 5 to 9 mph.

    High: 14 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 1. North wind 7 to 10 mph, with gusts as high as 18 mph.

    Low: 1 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 19. Northwest wind 8 to 11 mph, with gusts as high as 21 mph.

    High: 19 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 1. Northwest wind 3 to 7 mph.

    Low: 1 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 23.

    High: 23 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 13.

    Low: 13 °F

    Chance Snow
    then Mostly
    Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 0. Light north wind.
Thursday
Mostly cloudy, with a high near 17. Wind chill values between -8 and 2. North wind 3 to 5 mph.
Thursday Night
A chance of flurries after midnight. Mostly cloudy, with a low around -2. Wind chill values between -6 and -11. North wind 3 to 5 mph.
Friday
Mostly sunny, with a high near 14. Wind chill values between -2 and -12. North wind 5 to 9 mph.
Friday Night
Partly cloudy, with a low around 1. North wind 7 to 10 mph, with gusts as high as 18 mph.
Saturday
Mostly sunny, with a high near 19. Northwest wind 8 to 11 mph, with gusts as high as 21 mph.
Saturday Night
Mostly clear, with a low around 1. Northwest wind 3 to 7 mph.
Sunday
Mostly sunny, with a high near 23.
Sunday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 13.
Monday
Partly sunny, with a high near 30.
Monday Night
Mostly cloudy, with a low around 15.
Tuesday
Mostly cloudy, with a high near 30.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 18.
Wednesday
A chance of snow. Mostly cloudy, with a high near 30.
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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:
2:08 am CST Jan 29, 2026
Forecast Valid:
2am CST Jan 29, 2026-6pm CST Feb 4, 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