Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

35°F

2°C

Humidity 76%
Wind Speed SW 20 G 28 mph
Barometer 29.88 in (1012.5 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 9 Dec 9:54 am CST
Extended Forecast for

Decatur IL

  • Today

    Today: Partly sunny, with a high near 40. South southwest wind 11 to 14 mph, with gusts as high as 24 mph.

    High: 40 °F

    Partly Sunny

  • Tonight

    Tonight: A 40 percent chance of showers after 9pm.  Cloudy, with a low around 35. Breezy, with a south wind 16 to 24 mph becoming west after midnight. Winds could gust as high as 34 mph.

    Low: 35 °F

    Chance
    Showers and
    Breezy

  • Wednesday

    Wednesday: A chance of rain showers before 9am, then a chance of snow showers between 9am and noon.  Increasing clouds, with a temperature falling to around 31 by 5pm. Breezy, with a northwest wind 23 to 28 mph decreasing to 15 to 20 mph in the afternoon. Winds could gust as high as 45 mph.  Chance of precipitation is 40%.

    High: 39 °F

    Breezy.
    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 23. West northwest wind 7 to 14 mph, with gusts as high as 20 mph.

    Low: 23 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 32. West wind around 6 mph.

    High: 32 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A 40 percent chance of snow.  Mostly cloudy, with a low around 24. North northwest wind 6 to 9 mph becoming east after midnight.

    Low: 24 °F

    Chance Snow

  • Friday

    Friday: Mostly cloudy, with a high near 34. East southeast wind 9 to 13 mph becoming west northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 34 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 10.

    Low: 10 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 18.

    High: 18 °F

    Mostly Cloudy

Detailed Forecast

Today
Partly sunny, with a high near 40. South southwest wind 11 to 14 mph, with gusts as high as 24 mph.
Tonight
A 40 percent chance of showers after 9pm. Cloudy, with a low around 35. Breezy, with a south wind 16 to 24 mph becoming west after midnight. Winds could gust as high as 34 mph.
Wednesday
A chance of rain showers before 9am, then a chance of snow showers between 9am and noon. Increasing clouds, with a temperature falling to around 31 by 5pm. Breezy, with a northwest wind 23 to 28 mph decreasing to 15 to 20 mph in the afternoon. Winds could gust as high as 45 mph. Chance of precipitation is 40%.
Wednesday Night
Mostly cloudy, with a low around 23. West northwest wind 7 to 14 mph, with gusts as high as 20 mph.
Thursday
Mostly cloudy, with a high near 32. West wind around 6 mph.
Thursday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 24. North northwest wind 6 to 9 mph becoming east after midnight.
Friday
Mostly cloudy, with a high near 34. East southeast wind 9 to 13 mph becoming west northwest in the afternoon. Winds could gust as high as 21 mph.
Friday Night
Mostly cloudy, with a low around 10.
Saturday
Mostly cloudy, with a high near 18.
Saturday Night
Mostly cloudy, with a low around 0.
Sunday
Sunny, with a high near 14.
Sunday Night
Partly cloudy, with a low around 4.
Monday
Partly sunny, with a high near 28.
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
5:26 am CST Dec 9, 2025
10am CST Dec 9, 2025-6pm CST Dec 15, 2025
 
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Additional Resources

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