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Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

60°F

16°C

Humidity 58%
Wind Speed SW 12 mph
Barometer 29.95 in (1013.8 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 7 Oct 12:54 am CDT
Extended Forecast for

Blue Mound IL

  • Overnight

    Overnight: Clear, with a low around 50. South southwest wind around 8 mph, with gusts as high as 15 mph.

    Low: 50 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85. South southwest wind 7 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 51. North northwest wind 3 to 6 mph.

    Low: 51 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 80. Calm wind becoming north northwest 5 to 7 mph in the morning.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 51. North wind around 5 mph becoming calm.

    Low: 51 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 84. South wind 6 to 13 mph, with gusts as high as 17 mph.

    High: 84 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 58. South wind 7 to 9 mph.

    Low: 58 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Overnight
Clear, with a low around 50. South southwest wind around 8 mph, with gusts as high as 15 mph.
Wednesday
Sunny, with a high near 85. South southwest wind 7 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph.
Wednesday Night
Mostly clear, with a low around 51. North northwest wind 3 to 6 mph.
Thursday
Sunny, with a high near 80. Calm wind becoming north northwest 5 to 7 mph in the morning.
Thursday Night
Mostly clear, with a low around 51. North wind around 5 mph becoming calm.
Friday
Sunny, with a high near 84. South wind 6 to 13 mph, with gusts as high as 17 mph.
Friday Night
Clear, with a low around 58. South wind 7 to 9 mph.
Saturday
Sunny, with a high near 86.
Saturday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 60.
Sunday
A 40 percent chance of showers before 1pm. Partly sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 55.
Columbus Day
Mostly sunny, with a high near 84.
Monday Night
Mostly clear, with a low around 59.
Tuesday
Sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Blue Mound IL
 39.69°N 89.12°W (Elev. 614 ft)
Last Update:
12:51 am CDT Oct 7, 2026
Forecast Valid:
1am CDT Oct 7, 2026-6pm CDT Oct 13, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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