Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Partly Cloudy

36°F

2°C

Humidity 70%
Wind Speed SW 9 mph
Barometer 30.04 in (1017.9 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 10 Jan 5:54 pm CST
Extended Forecast for

Decatur IL

  • Tonight

    Tonight: Snow showers likely, possibly mixed with rain before 10pm, then a slight chance of snow showers after midnight.  Mostly cloudy, then gradually becoming mostly clear, with a low around 24. Blustery, with a west northwest wind 10 to 15 mph increasing to 16 to 21 mph after midnight. Winds could gust as high as 37 mph.  Chance of precipitation is 70%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 24 °F

    Rain/Snow
    Likely and
    Blustery

  • Sunday

    Sunday: Sunny, with a high near 34. Breezy, with a west northwest wind 15 to 20 mph decreasing to 9 to 14 mph in the afternoon. Winds could gust as high as 33 mph.

    High: 34 °F

    Mostly Sunny
    and Breezy
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 26. Southwest wind 6 to 10 mph, with gusts as high as 17 mph.

    Low: 26 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 44. West southwest wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 44 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 34. Southwest wind 7 to 11 mph, with gusts as high as 20 mph.

    Low: 34 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 53. West southwest wind 13 to 15 mph, with gusts as high as 25 mph.

    High: 53 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 33. West northwest wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 33 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 39.

    High: 39 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

Detailed Forecast

Tonight
Snow showers likely, possibly mixed with rain before 10pm, then a slight chance of snow showers after midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 24. Blustery, with a west northwest wind 10 to 15 mph increasing to 16 to 21 mph after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 70%. Total nighttime snow accumulation of less than a half inch possible.
Sunday
Sunny, with a high near 34. Breezy, with a west northwest wind 15 to 20 mph decreasing to 9 to 14 mph in the afternoon. Winds could gust as high as 33 mph.
Sunday Night
Mostly clear, with a low around 26. Southwest wind 6 to 10 mph, with gusts as high as 17 mph.
Monday
Mostly sunny, with a high near 44. West southwest wind 8 to 11 mph, with gusts as high as 18 mph.
Monday Night
Partly cloudy, with a low around 34. Southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 53. West southwest wind 13 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 33. West northwest wind 9 to 11 mph, with gusts as high as 20 mph.
Wednesday
Mostly cloudy, with a high near 39.
Wednesday Night
Partly cloudy, with a low around 18.
Thursday
Mostly sunny, with a high near 33.
Thursday Night
Mostly cloudy, with a low around 26.
Friday
A chance of snow. Mostly cloudy, with a high near 38.
Friday Night
Mostly cloudy, with a low around 21.
Saturday
Partly sunny, with a high near 29.
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
3:17 pm CST Jan 10, 2026
6pm CST Jan 10, 2026-6pm CST Jan 17, 2026
 
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Additional Resources

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