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Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Overcast

73°F

23°C

Humidity 94%
Wind Speed SW 10 mph
Barometer 29.89 in (1011.7 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 15 Oct 4:54 pm CDT
Extended Forecast for

Blue Mound IL

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 77. South southwest wind around 11 mph, with gusts as high as 18 mph.

    High: 77 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 11pm. Mostly cloudy, with a low around 46. Southwest wind 11 to 18 mph becoming west northwest after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 46 °F

    Showers
    Likely then
    Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers after 4pm. Mostly cloudy, with a high near 55. Breezy, with a northwest wind 20 to 22 mph, with gusts as high as 33 mph.

    High: 55 °F

    Breezy.
    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 35. North wind 10 to 17 mph, with gusts as high as 26 mph.

    Low: 35 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 59. North wind around 6 mph becoming calm in the morning.

    High: 59 °F

    Sunny

  • Saturday Night

    Saturday Night: Areas of frost after 3am. Otherwise, clear, with a low around 34. Light and variable wind.

    Low: 34 °F

    Clear then
    Areas Frost

  • Sunday

    Sunday: Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 68. South wind 5 to 9 mph.

    High: 68 °F

    Frost then
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 77. South southwest wind around 11 mph, with gusts as high as 18 mph.
Tonight
Showers and thunderstorms likely, mainly before 11pm. Mostly cloudy, with a low around 46. Southwest wind 11 to 18 mph becoming west northwest after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A 30 percent chance of showers after 4pm. Mostly cloudy, with a high near 55. Breezy, with a northwest wind 20 to 22 mph, with gusts as high as 33 mph.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 35. North wind 10 to 17 mph, with gusts as high as 26 mph.
Saturday
Sunny, with a high near 59. North wind around 6 mph becoming calm in the morning.
Saturday Night
Areas of frost after 3am. Otherwise, clear, with a low around 34. Light and variable wind.
Sunday
Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 68. South wind 5 to 9 mph.
Sunday Night
Mostly clear, with a low around 38.
Monday
Mostly sunny, with a high near 71.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 80.
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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:
4:36 pm CDT Oct 15, 2026
Forecast Valid:
5pm CDT Oct 15, 2026-6pm CDT Oct 22, 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