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.

A Few Clouds

39°F

4°C

Humidity 86%
Wind Speed W 7 mph
Barometer 30.04 in (1017.5 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 8 Mar 1:54 am CDT
Extended Forecast for

Elwin IL

  • Overnight

    Overnight: Partly cloudy, with a low around 35. West southwest wind around 8 mph.

    Low: 35 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 62. Southwest wind 9 to 16 mph, with gusts as high as 24 mph.

    High: 62 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 43. South southwest wind 11 to 13 mph, with gusts as high as 22 mph.

    Low: 43 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 72. Breezy, with a south southwest wind 14 to 20 mph, with gusts as high as 30 mph.

    High: 72 °F

    Sunny then
    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. South wind 13 to 16 mph, with gusts as high as 24 mph.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: Showers and thunderstorms likely after noon. Increasing clouds, with a high near 78. Breezy, with a south southwest wind 13 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Partly Sunny
    then T-storms
    Likely and
    Breezy

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 51. Breezy, with a south southwest wind 18 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

    Low: 51 °F

    Breezy.
    T-storms then
    Showers

  • Wednesday

    Wednesday: Showers. High near 63. Breezy. Chance of precipitation is 100%.

    High: 63 °F

    Breezy.
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 28. Blustery.

    Low: 28 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 35. West southwest wind around 8 mph.
Sunday
Sunny, with a high near 62. Southwest wind 9 to 16 mph, with gusts as high as 24 mph.
Sunday Night
Clear, with a low around 43. South southwest wind 11 to 13 mph, with gusts as high as 22 mph.
Monday
Sunny, with a high near 72. Breezy, with a south southwest wind 14 to 20 mph, with gusts as high as 30 mph.
Monday Night
Mostly clear, with a low around 58. South wind 13 to 16 mph, with gusts as high as 24 mph.
Tuesday
Showers and thunderstorms likely after noon. Increasing clouds, with a high near 78. Breezy, with a south southwest wind 13 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers and possibly a thunderstorm. Low around 51. Breezy, with a south southwest wind 18 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Wednesday
Showers. High near 63. Breezy. Chance of precipitation is 100%.
Wednesday Night
Partly cloudy, with a low around 28. Blustery.
Thursday
Mostly sunny, with a high near 47.
Thursday Night
Mostly cloudy, with a low around 40. Breezy.
Friday
Partly sunny, with a high near 59. Breezy.
Friday Night
Mostly cloudy, with a low around 33.
Saturday
Mostly cloudy, with a high near 49.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Elwin IL
 39.78°N 88.97°W (Elev. 705 ft)
Last Update:
12:26 am CST Mar 8, 2026
Forecast Valid:
1am CST Mar 8, 2026-6pm CDT Mar 14, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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