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.

Partly Cloudy

34°F

1°C

Humidity 82%
Wind Speed N 16 mph
Barometer 30.28 in (1025.6 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 27 Mar 6:54 am CDT
Extended Forecast for

Elwin IL

  • Today

    Today: Cloudy through mid morning, then gradual clearing, with a high near 48. North wind 16 to 18 mph, with gusts as high as 28 mph.

    High: 48 °F

    Gradual
    Clearing

  • Tonight

    Tonight: Mostly clear, with a low around 27. North northwest wind 7 to 13 mph, with gusts as high as 21 mph.

    Low: 27 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 51. North wind 5 to 10 mph becoming south in the afternoon. Winds could gust as high as 15 mph.

    High: 51 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 39. South wind 9 to 13 mph, with gusts as high as 20 mph.

    Low: 39 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 62. South wind 13 to 16 mph, with gusts as high as 24 mph.

    High: 62 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 53. South wind 11 to 13 mph, with gusts as high as 21 mph.

    Low: 53 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 77. South southwest wind 13 to 15 mph, with gusts as high as 23 mph.

    High: 77 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 30 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 62.

    Low: 62 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of rain after 1pm. Partly sunny, with a high near 81. Breezy.

    High: 81 °F

    Breezy.
    Partly Sunny
    then Chance
    Rain

Detailed Forecast

Today
Cloudy through mid morning, then gradual clearing, with a high near 48. North wind 16 to 18 mph, with gusts as high as 28 mph.
Tonight
Mostly clear, with a low around 27. North northwest wind 7 to 13 mph, with gusts as high as 21 mph.
Saturday
Sunny, with a high near 51. North wind 5 to 10 mph becoming south in the afternoon. Winds could gust as high as 15 mph.
Saturday Night
Mostly cloudy, with a low around 39. South wind 9 to 13 mph, with gusts as high as 20 mph.
Sunday
Mostly cloudy, with a high near 62. South wind 13 to 16 mph, with gusts as high as 24 mph.
Sunday Night
Mostly cloudy, with a low around 53. South wind 11 to 13 mph, with gusts as high as 21 mph.
Monday
Partly sunny, with a high near 77. South southwest wind 13 to 15 mph, with gusts as high as 23 mph.
Monday Night
A 30 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 62.
Tuesday
A 30 percent chance of rain after 1pm. Partly sunny, with a high near 81. Breezy.
Tuesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 58. Breezy.
Wednesday
A chance of rain and thunderstorms. Mostly cloudy, with a high near 71. Breezy.
Wednesday Night
Rain and thunderstorms likely. Mostly cloudy, with a low around 50.
Thursday
Rain and thunderstorms likely. Mostly cloudy, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Elwin IL
 39.8°N 88.94°W (Elev. 699 ft)
Last Update:
6:51 am CDT Mar 27, 2026
Forecast Valid:
7am CDT Mar 27, 2026-6pm CDT Apr 2, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation