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.

Partly Cloudy

73°F

23°C

Humidity 62%
Wind Speed SW 13 mph
Barometer 29.68 in (1004.6 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 16 Jun 4:54 pm CDT
Extended Forecast for

Blue Mound IL

Wind Advisory June 17, 01:00pm until June 17, 07:00pm
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 55. West wind 9 to 14 mph becoming light and variable. Winds could gust as high as 21 mph.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. Breezy, with a south southeast wind 9 to 14 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 45 mph.

    High: 86 °F

    Chance
    T-storms and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms, mainly before 11pm. Some of the storms could produce heavy rainfall. Low around 64. Breezy, with a west wind 20 to 25 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 64 °F

    Heavy Rain
    and Breezy
    then Partly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 75. West northwest wind around 14 mph, with gusts as high as 20 mph.

    High: 75 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 56. West northwest wind 5 to 9 mph becoming light northwest in the evening.

    Low: 56 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 78. Northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 78 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58. Northwest wind around 6 mph becoming calm.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers after 1am. Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 55. West wind 9 to 14 mph becoming light and variable. Winds could gust as high as 21 mph.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86. Breezy, with a south southeast wind 9 to 14 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 45 mph.
Wednesday Night
Showers and thunderstorms, mainly before 11pm. Some of the storms could produce heavy rainfall. Low around 64. Breezy, with a west wind 20 to 25 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday
Mostly sunny, with a high near 75. West northwest wind around 14 mph, with gusts as high as 20 mph.
Thursday Night
Mostly clear, with a low around 56. West northwest wind 5 to 9 mph becoming light northwest in the evening.
Juneteenth
Sunny, with a high near 78. Northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Friday Night
Mostly clear, with a low around 58. Northwest wind around 6 mph becoming calm.
Saturday
Mostly sunny, with a high near 81.
Saturday Night
A 30 percent chance of showers after 1am. Partly cloudy, with a low around 63.
Sunday
Showers likely, with thunderstorms also possible after 1pm. Partly sunny, with a high near 78. Chance of precipitation is 70%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63.
Monday
A chance of showers. Partly sunny, with a high near 78.
Monday Night
Mostly cloudy, with a low around 60.
Tuesday
Mostly sunny, with a high near 79.
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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:
5:16 pm CDT Jun 16, 2026
Forecast Valid:
5pm CDT Jun 16, 2026-6pm CDT Jun 23, 2026
 
Forecast Discussion
 
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Additional Resources

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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