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.

A Few Clouds

75°F

24°C

Humidity 84%
Wind Speed Calm
Barometer 30.04 in (1016.7 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 15 Jun 11:54 pm CDT
Extended Forecast for

Macon IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 69. East wind 3 to 5 mph.

    Low: 69 °F

    Mostly Cloudy

  • Monday

    Monday: Isolated showers and thunderstorms after 1pm. Mostly cloudy, with a high near 83. East wind 5 to 7 mph becoming south southeast in the afternoon. Chance of precipitation is 20%.

    High: 83 °F

    Mostly Cloudy
    then Isolated
    T-storms

  • Monday Night

    Monday Night: Isolated showers and thunderstorms before 10pm. Mostly cloudy, with a low around 66. South southeast wind 3 to 6 mph. Chance of precipitation is 20%.

    Low: 66 °F

    Isolated
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 88. South southwest wind 5 to 7 mph.

    High: 88 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. South wind 7 to 10 mph, with gusts as high as 16 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 85. South southwest wind 10 to 16 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: 85 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 66. Southwest wind 8 to 13 mph, with gusts as high as 20 mph.

    Low: 66 °F

    Chance
    T-storms

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 69. East wind 3 to 5 mph.
Monday
Isolated showers and thunderstorms after 1pm. Mostly cloudy, with a high near 83. East wind 5 to 7 mph becoming south southeast in the afternoon. Chance of precipitation is 20%.
Monday Night
Isolated showers and thunderstorms before 10pm. Mostly cloudy, with a low around 66. South southeast wind 3 to 6 mph. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 88. South southwest wind 5 to 7 mph.
Tuesday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 70. South wind 7 to 10 mph, with gusts as high as 16 mph.
Wednesday
Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 85. South southwest wind 10 to 16 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
A 50 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 66. Southwest wind 8 to 13 mph, with gusts as high as 20 mph.
Juneteenth
Mostly sunny, with a high near 81.
Thursday Night
Mostly clear, with a low around 63.
Friday
Sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 70.
Saturday
Sunny, with a high near 91.
Saturday Night
Mostly clear, with a low around 73.
Sunday
Sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Macon IL
 39.71°N 89.01°W (Elev. 699 ft)
Last Update:
12:11 am CDT Jun 16, 2025
Forecast Valid:
12am CDT Jun 16, 2025-6pm CDT Jun 22, 2025
 
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