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.

Fair

46°F

8°C

Humidity 86%
Wind Speed NW 10 mph
Barometer 29.87 in (1011.6 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 11 Nov 9:54 pm CST
Extended Forecast for

2 Miles WSW Decatur Airport IL

  • Tonight

    Tonight: Partly cloudy, with a low around 39. Northwest wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 39 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of rain between 11am and 5pm. Mostly cloudy, with a high near 47. North northwest wind 9 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

    High: 47 °F

    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 30. North northwest wind 10 to 14 mph, with gusts as high as 21 mph.

    Low: 30 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 43. North northwest wind 9 to 13 mph, with gusts as high as 20 mph.

    High: 43 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 24. North northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 24 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 46. Calm wind becoming north northwest around 5 mph.

    High: 46 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 24. Calm wind.

    Low: 24 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 39. Northwest wind 6 to 11 mph, with gusts as high as 20 mph.
Thursday
A slight chance of rain between 11am and 5pm. Mostly cloudy, with a high near 47. North northwest wind 9 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 30. North northwest wind 10 to 14 mph, with gusts as high as 21 mph.
Friday
Mostly sunny, with a high near 43. North northwest wind 9 to 13 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 24. North northwest wind 5 to 7 mph becoming calm in the evening.
Saturday
Sunny, with a high near 46. Calm wind becoming north northwest around 5 mph.
Saturday Night
Mostly clear, with a low around 24. Calm wind.
Sunday
Sunny, with a high near 49.
Sunday Night
Mostly clear, with a low around 27.
Monday
Sunny, with a high near 49.
Monday Night
Mostly clear, with a low around 28.
Tuesday
Sunny, with a high near 51.
Tuesday Night
Mostly clear, with a low around 29.
Wednesday
Sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles WSW Decatur Airport IL
 39.84°N 88.91°W (Elev. 620 ft)
Last Update:
10:21 pm CST Nov 11, 2026
Forecast Valid:
10pm CST Nov 11, 2026-6pm CST Nov 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation