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 Rain

79°F

26°C

Humidity 94%
Wind Speed SW 6 mph
Barometer 30.02 in (1015.8 mb)
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 16 Aug 1:54 am CDT
Extended Forecast for

Elwin IL

  • Overnight

    Overnight: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. West southwest wind 3 to 5 mph.

    Low: 73 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers and thunderstorms likely, mainly before 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 86. West wind 6 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Showers
    Likely then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 68. Northwest wind 5 to 7 mph.

    Low: 68 °F

    Slight Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 82. North northwest wind 6 to 9 mph.

    High: 82 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 63. North wind around 6 mph becoming calm in the evening.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 84. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 84 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Showers likely after 1am. Partly cloudy, with a low around 68. South wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 68 °F

    Partly Cloudy
    then Showers
    Likely

  • Wednesday

    Wednesday: A 50 percent chance of showers before 1pm. Partly sunny, with a high near 81.

    High: 81 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73. West southwest wind 3 to 5 mph.
Sunday
Showers and thunderstorms likely, mainly before 3pm. Cloudy, then gradually becoming mostly sunny, with a high near 86. West wind 6 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A 20 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 68. Northwest wind 5 to 7 mph.
Monday
Mostly sunny, with a high near 82. North northwest wind 6 to 9 mph.
Monday Night
Mostly clear, with a low around 63. North wind around 6 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 84. Calm wind becoming southwest around 5 mph in the afternoon.
Tuesday Night
Showers likely after 1am. Partly cloudy, with a low around 68. South wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
A 50 percent chance of showers before 1pm. Partly sunny, with a high near 81.
Wednesday Night
Partly cloudy, with a low around 62.
Thursday
Mostly sunny, with a high near 78.
Thursday Night
Partly cloudy, with a low around 60.
Friday
Mostly sunny, with a high near 79.
Friday Night
Partly cloudy, with a low around 62.
Saturday
Mostly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Elwin IL
 39.78°N 88.97°W (Elev. 705 ft)
Last Update:
1:26 am CDT Aug 16, 2026
Forecast Valid:
2am CDT Aug 16, 2026-6pm CDT Aug 22, 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