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.

A Few Clouds

81°F

27°C

Humidity 69%
Wind Speed N 10 mph
Barometer 29.97 in (1014.4 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 5 Jul 1:54 pm CDT
Extended Forecast for

Macon IL

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 82. North northwest wind around 8 mph.

    High: 82 °F

    Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 65. North northeast wind 5 to 8 mph.

    Low: 65 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 81. North northeast wind 7 to 9 mph.

    High: 81 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 62. North northeast wind 5 to 9 mph.

    Low: 62 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 85. Northeast wind 5 to 7 mph.

    High: 85 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63. Northeast wind around 5 mph becoming calm in the evening.

    Low: 63 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.

    High: 88 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 82. North northwest wind around 8 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 65. North northeast wind 5 to 8 mph.
Monday
Partly sunny, with a high near 81. North northeast wind 7 to 9 mph.
Monday Night
Partly cloudy, with a low around 62. North northeast wind 5 to 9 mph.
Tuesday
Sunny, with a high near 85. Northeast wind 5 to 7 mph.
Tuesday Night
Mostly clear, with a low around 63. Northeast wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 85. Calm wind becoming south southwest around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 67.
Thursday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 84.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Saturday
Mostly sunny, with a high near 84.
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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:
1:59 pm CDT Jul 5, 2026
Forecast Valid:
2pm CDT Jul 5, 2026-6pm CDT Jul 11, 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