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

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Mostly Cloudy

78°F

26°C

Humidity 79%
Wind Speed Calm
Barometer 30.02 in (1016.1 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 15 Jun 8:54 pm CDT
Extended Forecast for

6 Miles NNW Shelbyville IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 69. Light east northeast wind.

    Low: 69 °F

    Mostly Cloudy

  • Monday

    Monday: Isolated showers, then scattered showers and thunderstorms after 1pm. Mostly cloudy, with a high near 82. Light and variable wind becoming southeast around 6 mph in the morning. Chance of precipitation is 30%.

    High: 82 °F

    Isolated
    Showers then
    Scattered
    T-storms

  • Monday Night

    Monday Night: Isolated showers and thunderstorms before 10pm. Mostly cloudy, with a low around 66. South southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 66 °F

    Isolated
    T-storms then
    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 87. Southwest wind 3 to 6 mph.

    High: 87 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 70. South wind 5 to 7 mph.

    Low: 70 °F

    Partly Cloudy
    then Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 84. Southwest wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 84 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely before 1am. Mostly cloudy, with a low around 66. South southwest wind 6 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    T-storms
    Likely

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 69. Light east northeast wind.
Monday
Isolated showers, then scattered showers and thunderstorms after 1pm. Mostly cloudy, with a high near 82. Light and variable wind becoming southeast around 6 mph in the morning. Chance of precipitation is 30%.
Monday Night
Isolated showers and thunderstorms before 10pm. Mostly cloudy, with a low around 66. South southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 87. Southwest wind 3 to 6 mph.
Tuesday Night
A 30 percent chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 70. South wind 5 to 7 mph.
Wednesday
Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 84. Southwest wind 9 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Showers and thunderstorms likely before 1am. Mostly cloudy, with a low around 66. South southwest wind 6 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Juneteenth
Mostly sunny, with a high near 80.
Thursday Night
Mostly clear, with a low around 62.
Friday
Sunny, with a high near 85.
Friday Night
Mostly clear, with a low around 70.
Saturday
Sunny, with a high near 90.
Saturday Night
Mostly clear, with a low around 72.
Sunday
Sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles NNW Shelbyville IL
 39.49°N 88.88°W (Elev. 676 ft)
Last Update:
6:56 pm CDT Jun 15, 2025
Forecast Valid:
9pm CDT Jun 15, 2025-6pm CDT Jun 22, 2025
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation