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Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

58°F

14°C

Humidity 70%
Wind Speed SE 3 mph
Barometer 30.10 in (1019.1 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 8 Oct 8:54 pm CDT
Extended Forecast for

2 Miles S Blue Mound IL

  • Tonight

    Tonight: Clear, with a low around 54. Calm wind becoming southeast around 5 mph after midnight.

    Low: 54 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 87. South wind 5 to 11 mph, with gusts as high as 16 mph.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 59. South southeast wind around 8 mph.

    Low: 59 °F

    Clear

  • Saturday

    Saturday: Increasing clouds, with a high near 83. South wind 7 to 10 mph, with gusts as high as 15 mph.

    High: 83 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 59. East southeast wind 7 to 9 mph.

    Low: 59 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: Partly sunny, with a high near 78. East wind around 6 mph becoming north in the afternoon.

    High: 78 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 57. Calm wind.

    Low: 57 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 54. Calm wind becoming southeast around 5 mph after midnight.
Friday
Sunny, with a high near 87. South wind 5 to 11 mph, with gusts as high as 16 mph.
Friday Night
Clear, with a low around 59. South southeast wind around 8 mph.
Saturday
Increasing clouds, with a high near 83. South wind 7 to 10 mph, with gusts as high as 15 mph.
Saturday Night
A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 59. East southeast wind 7 to 9 mph.
Sunday
Partly sunny, with a high near 78. East wind around 6 mph becoming north in the afternoon.
Sunday Night
Mostly clear, with a low around 57. Calm wind.
Columbus Day
Sunny, with a high near 88.
Monday Night
Mostly clear, with a low around 64.
Tuesday
Sunny, with a high near 81.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 55.
Wednesday
A chance of showers. Partly sunny, with a high near 77.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 58.
Thursday
A chance of showers. Mostly sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Blue Mound IL
 39.67°N 89.12°W (Elev. 627 ft)
Last Update:
9:36 pm CDT Oct 8, 2026
Forecast Valid:
9pm CDT Oct 8, 2026-6pm CDT Oct 15, 2026
 
Forecast Discussion
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation