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

61°F

16°C

Humidity 90%
Wind Speed SW 17 G 29 mph
Barometer 29.85 in (1010.5 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 7 Mar 10:54 am CST
Extended Forecast for

3 Miles NNE Decatur IL

  • Today

    Today: A 20 percent chance of showers before 2pm. Cloudy, with a temperature falling to around 45 by 5pm. West wind 15 to 18 mph, with gusts as high as 30 mph.

    High: 64 °F⇓

    Slight Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 35. West northwest wind 6 to 14 mph, with gusts as high as 21 mph.

    Low: 35 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 62. Southwest wind 7 to 14 mph, with gusts as high as 22 mph.

    High: 62 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 44. South southwest wind 10 to 13 mph, with gusts as high as 21 mph.

    Low: 44 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 73. South southwest wind 11 to 17 mph, with gusts as high as 25 mph.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 55. South southwest wind around 11 mph, with gusts as high as 18 mph.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 76. South wind 10 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 76 °F

    Mostly Sunny
    then Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers, with thunderstorms also possible after midnight. Low around 48. Breezy. Chance of precipitation is 90%.

    Low: 48 °F

    Showers and
    Breezy

  • Wednesday

    Wednesday: Showers, mainly before noon. High near 60. Breezy. Chance of precipitation is 80%.

    High: 60 °F

    Breezy.
    Showers then
    Chance
    Showers

Detailed Forecast

Today
A 20 percent chance of showers before 2pm. Cloudy, with a temperature falling to around 45 by 5pm. West wind 15 to 18 mph, with gusts as high as 30 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 35. West northwest wind 6 to 14 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 62. Southwest wind 7 to 14 mph, with gusts as high as 22 mph.
Sunday Night
Clear, with a low around 44. South southwest wind 10 to 13 mph, with gusts as high as 21 mph.
Monday
Sunny, with a high near 73. South southwest wind 11 to 17 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 55. South southwest wind around 11 mph, with gusts as high as 18 mph.
Tuesday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 76. South wind 10 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Showers, with thunderstorms also possible after midnight. Low around 48. Breezy. Chance of precipitation is 90%.
Wednesday
Showers, mainly before noon. High near 60. Breezy. Chance of precipitation is 80%.
Wednesday Night
Mostly cloudy, with a low around 30.
Thursday
Mostly sunny, with a high near 48.
Thursday Night
Mostly cloudy, with a low around 37.
Friday
Mostly cloudy, with a high near 60. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNE Decatur IL
 39.88°N 88.91°W (Elev. 673 ft)
Last Update:
10:56 am CST Mar 7, 2026
Forecast Valid:
11am CST Mar 7, 2026-6pm CDT Mar 13, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation