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.

Light Snow Fog/Mist

24°F

-4°C

Humidity 96%
Wind Speed Calm
Barometer 30.13 in (1021.3 mb)
Dewpoint 23°F (-5°C)
Visibility 1.50 mi
Last update 1 Dec 5:54 pm CST
Extended Forecast for

3 Miles W Arthur IL

Winter Weather Advisory until December 2, 06:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until December 2, 06:00am

    NOW until 6:00am Tue

    Winter Weather Advisory

  • Tonight

    Low: 16 °F

    Snow then
    Snow Likely

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 23. Northwest wind 5 to 7 mph becoming light and variable in the afternoon.

    High: 23 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 14. Wind chill values between 5 and 10. South wind 5 to 9 mph.

    Low: 14 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 33. South southwest wind 7 to 10 mph, with gusts as high as 17 mph.

    High: 33 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 4. West wind 6 to 11 mph becoming north northwest in the evening. Winds could gust as high as 16 mph.

    Low: 4 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 13. North northwest wind 5 to 10 mph becoming light north in the afternoon. Winds could gust as high as 16 mph.

    High: 13 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around -2. Calm wind becoming south around 5 mph after midnight.

    Low: -2 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

Detailed Forecast

Tonight
Snow, mainly before 1am. Low around 16. Calm wind becoming northwest 5 to 8 mph after midnight. Chance of precipitation is 100%. Total nighttime snow accumulation of 1 to 3 inches possible.
Tuesday
Mostly cloudy, with a high near 23. Northwest wind 5 to 7 mph becoming light and variable in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 14. Wind chill values between 5 and 10. South wind 5 to 9 mph.
Wednesday
Partly sunny, with a high near 33. South southwest wind 7 to 10 mph, with gusts as high as 17 mph.
Wednesday Night
Mostly cloudy, with a low around 4. West wind 6 to 11 mph becoming north northwest in the evening. Winds could gust as high as 16 mph.
Thursday
Sunny, with a high near 13. North northwest wind 5 to 10 mph becoming light north in the afternoon. Winds could gust as high as 16 mph.
Thursday Night
Partly cloudy, with a low around -2. Calm wind becoming south around 5 mph after midnight.
Friday
Mostly sunny, with a high near 28.
Friday Night
Mostly cloudy, with a low around 18.
Saturday
Mostly cloudy, with a high near 32.
Saturday Night
Mostly cloudy, with a low around 19.
Sunday
Mostly cloudy, with a high near 30.
Sunday Night
Mostly cloudy, with a low around 11.
Monday
Partly sunny, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Arthur IL
 39.72°N 88.52°W (Elev. 682 ft)
Last Update:
4:46 pm CST Dec 1, 2025
Forecast Valid:
6pm CST Dec 1, 2025-6pm CST Dec 8, 2025
 
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