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Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

65°F

18°C

Humidity 70%
Wind Speed SW 6 mph
Barometer 29.97 in (1014.7 mb)
Dewpoint 55°F (13°C)
Visibility 9.00 mi
Last update 11 Oct 9:54 pm CDT
Extended Forecast for

Macon IL

  • Tonight

    Tonight: Partly cloudy, with a low around 61. South wind 5 to 8 mph.

    Low: 61 °F

    Partly Cloudy

  • Columbus Day

    Columbus Day: Sunny, with a high near 90. Southwest wind 7 to 15 mph, with gusts as high as 20 mph.

    High: 90 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 70. South southwest wind 9 to 13 mph, with gusts as high as 18 mph.

    Low: 70 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 91. West southwest wind 10 to 14 mph, with gusts as high as 18 mph.

    High: 91 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers before 10pm, then a chance of showers and thunderstorms between 10pm and 4am, then a chance of showers after 4am. Increasing clouds, with a low around 68. Southwest wind around 6 mph. Chance of precipitation is 50%.

    Low: 68 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers. High near 80. North wind around 6 mph becoming southwest in the morning. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 80 °F

    Showers

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 60. Northeast wind 7 to 10 mph, with gusts as high as 15 mph.

    Low: 60 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers, with thunderstorms also possible after 1pm. High near 74. Chance of precipitation is 80%.

    High: 74 °F

    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.

    Low: 52 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 61. South wind 5 to 8 mph.
Columbus Day
Sunny, with a high near 90. Southwest wind 7 to 15 mph, with gusts as high as 20 mph.
Monday Night
Clear, with a low around 70. South southwest wind 9 to 13 mph, with gusts as high as 18 mph.
Tuesday
Sunny, with a high near 91. West southwest wind 10 to 14 mph, with gusts as high as 18 mph.
Tuesday Night
A chance of showers before 10pm, then a chance of showers and thunderstorms between 10pm and 4am, then a chance of showers after 4am. Increasing clouds, with a low around 68. Southwest wind around 6 mph. Chance of precipitation is 50%.
Wednesday
Showers. High near 80. North wind around 6 mph becoming southwest in the morning. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 60. Northeast wind 7 to 10 mph, with gusts as high as 15 mph.
Thursday
Showers, with thunderstorms also possible after 1pm. High near 74. Chance of precipitation is 80%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.
Friday
Partly sunny, with a high near 64. Breezy.
Friday Night
Partly cloudy, with a low around 38.
Saturday
Sunny, with a high near 58.
Saturday Night
Clear, with a low around 35.
Sunday
Sunny, with a high near 65.
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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:
9:36 pm CDT Oct 11, 2026
Forecast Valid:
10pm CDT Oct 11, 2026-6pm CDT Oct 18, 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