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.

Overcast

57°F

14°C

Humidity 27%
Wind Speed S 7 mph
Barometer 30.26 in (1025.1 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 24 Mar 2:54 pm CDT
Extended Forecast for

3 Miles W Decatur IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 57. South southeast wind around 7 mph.

    High: 57 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 40. Southeast wind around 7 mph.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72. South southwest wind 7 to 15 mph, with gusts as high as 24 mph.

    High: 72 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 58. South wind 10 to 14 mph, with gusts as high as 20 mph.

    Low: 58 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Southwest wind 11 to 18 mph, with gusts as high as 28 mph.

    High: 86 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Showers and thunderstorms before 10pm, then showers and possibly a thunderstorm between 10pm and 1am, then showers likely after 1am. Low around 37. Breezy, with a west northwest wind 14 to 20 mph becoming north northeast after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 37 °F

    Breezy.
    T-storms then
    Showers

  • Friday

    Friday: Partly sunny, with a high near 49. North northeast wind 15 to 18 mph, with gusts as high as 26 mph.

    High: 49 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 57. South southeast wind around 7 mph.
Tonight
Mostly cloudy, with a low around 40. Southeast wind around 7 mph.
Wednesday
Mostly sunny, with a high near 72. South southwest wind 7 to 15 mph, with gusts as high as 24 mph.
Wednesday Night
Mostly cloudy, with a low around 58. South wind 10 to 14 mph, with gusts as high as 20 mph.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Southwest wind 11 to 18 mph, with gusts as high as 28 mph.
Thursday Night
Showers and thunderstorms before 10pm, then showers and possibly a thunderstorm between 10pm and 1am, then showers likely after 1am. Low around 37. Breezy, with a west northwest wind 14 to 20 mph becoming north northeast after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Friday
Partly sunny, with a high near 49. North northeast wind 15 to 18 mph, with gusts as high as 26 mph.
Friday Night
Mostly clear, with a low around 29.
Saturday
Sunny, with a high near 55.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
Partly sunny, with a high near 61.
Sunday Night
Mostly cloudy, with a low around 47.
Monday
Mostly sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles W Decatur IL
 39.84°N 89°W (Elev. 600 ft)
Last Update:
1:56 pm CDT Mar 24, 2026
Forecast Valid:
3pm CDT Mar 24, 2026-6pm CDT Mar 30, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation