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Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Light Rain Fog/Mist

69°F

21°C

Humidity 93%
Wind Speed SE 8 mph
Barometer 30.00 in (1015.4 mb)
Dewpoint 67°F (19°C)
Visibility 5.00 mi
Last update 15 Oct 11:54 am CDT
Extended Forecast for

Macon IL

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm before 4pm, then a chance of showers and thunderstorms, mainly after 5pm. High near 76. South southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Showers

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before midnight. Mostly cloudy, with a low around 46. Breezy, with a southwest wind 13 to 20 mph becoming west northwest after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 46 °F

    Showers
    Likely then
    Chance
    Showers and
    Breezy

  • Friday

    Friday: A 30 percent chance of showers after 4pm. Partly sunny, with a high near 55. Breezy, with a northwest wind around 22 mph, with gusts as high as 32 mph.

    High: 55 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 36. North wind 11 to 17 mph, with gusts as high as 26 mph.

    Low: 36 °F

    Partly Cloudy

  • Saturday

    Saturday: Areas of frost before 8am. Otherwise, sunny, with a high near 58. North wind 5 to 7 mph becoming calm in the afternoon.

    High: 58 °F

    Areas Frost
    then Sunny

  • Saturday Night

    Saturday Night: Areas of frost after 3am. Otherwise, clear, with a low around 34. Calm wind becoming south southeast around 5 mph after midnight.

    Low: 34 °F

    Clear then
    Areas Frost

  • Sunday

    Sunday: Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 68. South wind 6 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 73.

    High: 73 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm before 4pm, then a chance of showers and thunderstorms, mainly after 5pm. High near 76. South southwest wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely, mainly before midnight. Mostly cloudy, with a low around 46. Breezy, with a southwest wind 13 to 20 mph becoming west northwest after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A 30 percent chance of showers after 4pm. Partly sunny, with a high near 55. Breezy, with a northwest wind around 22 mph, with gusts as high as 32 mph.
Friday Night
Partly cloudy, with a low around 36. North wind 11 to 17 mph, with gusts as high as 26 mph.
Saturday
Areas of frost before 8am. Otherwise, sunny, with a high near 58. North wind 5 to 7 mph becoming calm in the afternoon.
Saturday Night
Areas of frost after 3am. Otherwise, clear, with a low around 34. Calm wind becoming south southeast around 5 mph after midnight.
Sunday
Widespread frost, mainly before 7am. Otherwise, sunny, with a high near 68. South wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 38.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Mostly sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Macon IL
 39.71°N 88.98°W (Elev. 699 ft)
Last Update:
11:41 am CDT Oct 15, 2026
Forecast Valid:
12pm CDT Oct 15, 2026-6pm CDT Oct 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation