National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

44°F

7°C

Humidity 55%
Wind Speed SW 13 mph
Barometer 30.15 in (1021.4 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 12 Jan 3:54 pm CST
Extended Forecast for

Elwin IL

  • Tonight

    Tonight: Mostly cloudy during the early evening, then becoming clear, with a low around 33. South southwest wind 7 to 11 mph, with gusts as high as 21 mph.

    Low: 33 °F

    Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 53. West wind 13 to 17 mph, with gusts as high as 29 mph.

    High: 53 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35. West wind 10 to 16 mph, with gusts as high as 24 mph.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a temperature falling to around 27 by 5pm. Breezy, with a north northwest wind 18 to 25 mph, with gusts as high as 38 mph.

    High: 35 °F⇓

    Mostly Cloudy
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 13. Blustery, with a north northwest wind 14 to 20 mph, with gusts as high as 30 mph.

    Low: 13 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 28. Northwest wind 8 to 14 mph becoming west southwest in the afternoon. Winds could gust as high as 18 mph.

    High: 28 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 21. South southwest wind 8 to 15 mph, with gusts as high as 22 mph.

    Low: 21 °F

    Chance Snow

  • Friday

    Friday: A 40 percent chance of snow after noon. Mostly cloudy, with a high near 37.

    High: 37 °F

    Mostly Cloudy
    then Chance
    Snow

  • Friday Night

    Friday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 14.

    Low: 14 °F

    Chance Snow
    then Mostly
    Cloudy

Detailed Forecast

Tonight
Mostly cloudy during the early evening, then becoming clear, with a low around 33. South southwest wind 7 to 11 mph, with gusts as high as 21 mph.
Tuesday
Partly sunny, with a high near 53. West wind 13 to 17 mph, with gusts as high as 29 mph.
Tuesday Night
Mostly cloudy, with a low around 35. West wind 10 to 16 mph, with gusts as high as 24 mph.
Wednesday
Mostly cloudy, with a temperature falling to around 27 by 5pm. Breezy, with a north northwest wind 18 to 25 mph, with gusts as high as 38 mph.
Wednesday Night
Partly cloudy, with a low around 13. Blustery, with a north northwest wind 14 to 20 mph, with gusts as high as 30 mph.
Thursday
Increasing clouds, with a high near 28. Northwest wind 8 to 14 mph becoming west southwest in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 21. South southwest wind 8 to 15 mph, with gusts as high as 22 mph.
Friday
A 40 percent chance of snow after noon. Mostly cloudy, with a high near 37.
Friday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 14.
Saturday
Mostly cloudy, with a high near 22.
Saturday Night
Mostly cloudy, with a low around 5.
Sunday
Partly sunny, with a high near 18.
Sunday Night
Partly cloudy, with a low around 9.
M.L.King Day
Mostly sunny, with a high near 27.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Elwin IL
 39.78°N 88.97°W (Elev. 705 ft)
Last Update:
3:36 pm CST Jan 12, 2026
Forecast Valid:
4pm CST Jan 12, 2026-6pm CST Jan 19, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation