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

24°F

-4°C

Humidity 75%
Wind Speed N 7 mph
Barometer 30.02 in (1017.4 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 3 Jan 4:54 am CST
Extended Forecast for

2 Miles SSW Decatur IL

  • Today

    Today: Mostly cloudy, then gradually becoming sunny, with a high near 35. Northeast wind around 5 mph becoming light and variable.

    High: 35 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Partly cloudy, with a low around 20. North northwest wind around 6 mph becoming calm in the evening.

    Low: 20 °F

    Partly Cloudy

  • Sunday

    Sunday: Increasing clouds, with a high near 36. Calm wind becoming south southeast 5 to 7 mph in the afternoon.

    High: 36 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 29. South wind 7 to 10 mph, with gusts as high as 18 mph.

    Low: 29 °F

    Decreasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 51. South southwest wind 7 to 10 mph, with gusts as high as 17 mph.

    High: 51 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 39. South wind around 6 mph.

    Low: 39 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 57. South wind 6 to 8 mph becoming west southwest in the afternoon.

    High: 57 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 35. Northeast wind around 5 mph becoming light and variable.
Tonight
Partly cloudy, with a low around 20. North northwest wind around 6 mph becoming calm in the evening.
Sunday
Increasing clouds, with a high near 36. Calm wind becoming south southeast 5 to 7 mph in the afternoon.
Sunday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 29. South wind 7 to 10 mph, with gusts as high as 18 mph.
Monday
Mostly sunny, with a high near 51. South southwest wind 7 to 10 mph, with gusts as high as 17 mph.
Monday Night
Mostly cloudy, with a low around 39. South wind around 6 mph.
Tuesday
Mostly sunny, with a high near 57. South wind 6 to 8 mph becoming west southwest in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
Mostly sunny, with a high near 56.
Wednesday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 43.
Thursday
Rain likely. Mostly cloudy, with a high near 60.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 47.
Friday
A chance of rain. Partly sunny, with a high near 56.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Decatur IL
 39.86°N 88.94°W (Elev. 682 ft)
Last Update:
3:16 am CST Jan 3, 2026
Forecast Valid:
5am CST Jan 3, 2026-6pm CST Jan 9, 2026
 
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Additional Resources

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