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

64°F

18°C

Humidity 81%
Wind Speed NE 16 mph
Barometer 29.94 in (1013.6 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 22 Jun 9:54 am CDT
Extended Forecast for

Blue Mound IL

  • Today

    Today: Cloudy, with a high near 73. North northeast wind 10 to 14 mph, with gusts as high as 22 mph.

    High: 73 °F

    Cloudy

  • Tonight

    Tonight: Mostly cloudy during the early evening, then gradual clearing, with a low around 54. North wind 3 to 8 mph.

    Low: 54 °F

    Gradual
    Clearing

  • Tuesday

    Tuesday: Sunny, with a high near 78. Light east northeast wind.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 58. Calm wind becoming southeast around 5 mph after midnight.

    Low: 58 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. South southwest wind 6 to 8 mph.

    High: 79 °F

    Partly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 62. South southwest wind 3 to 7 mph.

    Low: 62 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 80. Light west northwest wind becoming northwest 5 to 9 mph in the morning.

    High: 80 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers before 1am. Partly cloudy, with a low around 60.

    Low: 60 °F

    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
Cloudy, with a high near 73. North northeast wind 10 to 14 mph, with gusts as high as 22 mph.
Tonight
Mostly cloudy during the early evening, then gradual clearing, with a low around 54. North wind 3 to 8 mph.
Tuesday
Sunny, with a high near 78. Light east northeast wind.
Tuesday Night
Partly cloudy, with a low around 58. Calm wind becoming southeast around 5 mph after midnight.
Wednesday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. South southwest wind 6 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 62. South southwest wind 3 to 7 mph.
Thursday
Mostly sunny, with a high near 80. Light west northwest wind becoming northwest 5 to 9 mph in the morning.
Thursday Night
A 30 percent chance of showers before 1am. Partly cloudy, with a low around 60.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79.
Friday Night
A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 83.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Sunday
Mostly sunny, with a high near 89.
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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:
9:17 am CDT Jun 22, 2026
Forecast Valid:
10am CDT Jun 22, 2026-6pm CDT Jun 28, 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