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Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

69°F

21°C

Humidity 87%
Wind Speed NE 6 mph
Barometer 30.01 in (1015.9 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 25 Jun 9:54 pm CDT
Extended Forecast for

Macon IL

Flood Watch until June 27, 01:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until June 27, 01:00pm

    NOW until 1:00pm Sat

    Flood Watch

  • Tonight

    Low: 64 °F

    Chance
    T-storms then
    T-storms
    Likely

  • Friday

    Friday: Showers and possibly a thunderstorm before 2pm, then showers and thunderstorms likely after 2pm. Some of the storms could produce heavy rainfall. High near 74. East wind 9 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.

    High: 74 °F

    Heavy Rain

  • Friday Night

    Friday Night: A 50 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 64. North wind 7 to 10 mph, with gusts as high as 15 mph.

    Low: 64 °F

    Chance
    T-storms then
    Slight Chance
    T-storms

  • Saturday

    Saturday: Partly sunny, with a high near 81. North wind 5 to 7 mph becoming east southeast in the afternoon.

    High: 81 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 67. East southeast wind 5 to 7 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Partly Cloudy
    then Showers
    Likely

  • Sunday

    Sunday: Mostly sunny, with a high near 89. South southeast wind 9 to 13 mph, with gusts as high as 18 mph.

    High: 89 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 72. South southeast wind 8 to 11 mph, with gusts as high as 17 mph.

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

Detailed Forecast

Tonight
Showers and thunderstorms likely, mainly after 2am. Cloudy, with a low around 64. East wind around 6 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Showers and possibly a thunderstorm before 2pm, then showers and thunderstorms likely after 2pm. Some of the storms could produce heavy rainfall. High near 74. East wind 9 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.
Friday Night
A 50 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 64. North wind 7 to 10 mph, with gusts as high as 15 mph.
Saturday
Partly sunny, with a high near 81. North wind 5 to 7 mph becoming east southeast in the afternoon.
Saturday Night
Showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 67. East southeast wind 5 to 7 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Mostly sunny, with a high near 89. South southeast wind 9 to 13 mph, with gusts as high as 18 mph.
Sunday Night
Mostly clear, with a low around 72. South southeast wind 8 to 11 mph, with gusts as high as 17 mph.
Monday
Sunny, with a high near 92.
Monday Night
Mostly clear, with a low around 73.
Tuesday
Sunny, with a high near 93.
Tuesday Night
Clear, with a low around 73.
Wednesday
Sunny, with a high near 94.
Wednesday Night
Mostly clear, with a low around 73.
Thursday
Sunny, with a high near 93.
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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:
9:37 pm CDT Jun 25, 2026
Forecast Valid:
10pm CDT Jun 25, 2026-6pm CDT Jul 2, 2026
 
Forecast Discussion
 
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Additional Resources

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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