National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Overcast and Breezy

23°F

-5°C

Humidity 72%
Wind Speed W 22 G 35 mph
Barometer 29.96 in (1015.6 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 16 Mar 5:54 pm CDT
Extended Forecast for

Blue Mound IL

  • Tonight

    Tonight: Scattered flurries before 8pm. Mostly cloudy, with a low around 12. Wind chill values between -5 and 5. Blustery, with a west northwest wind 17 to 23 mph, with gusts as high as 32 mph.

    Low: 12 °F

    Scattered
    Flurries and
    Blustery

  • Tuesday

    Tuesday: Partly sunny, with a high near 28. Wind chill values between -4 and 6. West northwest wind 8 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

    High: 28 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Snow likely. Mostly cloudy, with a low around 24. South southeast wind 6 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    Low: 24 °F

    Snow Likely

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 55. South wind 11 to 16 mph becoming west southwest in the afternoon. Winds could gust as high as 23 mph.

    High: 55 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 37. West southwest wind around 6 mph becoming south after midnight.

    Low: 37 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 66. South wind 7 to 9 mph becoming west southwest in the afternoon.

    High: 66 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 42. North northwest wind around 7 mph becoming south southeast after midnight.

    Low: 42 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Scattered flurries before 8pm. Mostly cloudy, with a low around 12. Wind chill values between -5 and 5. Blustery, with a west northwest wind 17 to 23 mph, with gusts as high as 32 mph.
Tuesday
Partly sunny, with a high near 28. Wind chill values between -4 and 6. West northwest wind 8 to 14 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Snow likely. Mostly cloudy, with a low around 24. South southeast wind 6 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 55. South wind 11 to 16 mph becoming west southwest in the afternoon. Winds could gust as high as 23 mph.
Wednesday Night
Mostly cloudy, with a low around 37. West southwest wind around 6 mph becoming south after midnight.
Thursday
Mostly sunny, with a high near 66. South wind 7 to 9 mph becoming west southwest in the afternoon.
Thursday Night
Partly cloudy, with a low around 42. North northwest wind around 7 mph becoming south southeast after midnight.
Friday
Mostly sunny, with a high near 72.
Friday Night
Mostly cloudy, with a low around 47.
Saturday
Mostly sunny, with a high near 72.
Saturday Night
Mostly clear, with a low around 46.
Sunday
Mostly sunny, with a high near 67.
Sunday Night
Mostly cloudy, with a low around 35.
Monday
Partly sunny, with a high near 51.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Blue Mound IL
 39.69°N 89.12°W (Elev. 614 ft)
Last Update:
4:41 pm CDT Mar 16, 2026
Forecast Valid:
6pm CDT Mar 16, 2026-6pm CDT Mar 23, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation