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.

Fair

34°F

1°C

Humidity 100%
Wind Speed S 3 mph
Barometer 30.17 in (1022.0 mb)
Dewpoint 34°F (1°C)
Visibility 7.00 mi
Last update 23 Nov 10:54 pm CST
Extended Forecast for

2 Miles S Macon IL

Dense Fog Advisory November 23, 11:48pm until November 24, 10:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory November 23, 11:48pm until November 24, 10:00am

    NOW until 10:00am Mon

    Dense Fog Advisory

  • Tonight

    Low: 38 °F

    Patchy Dense
    Fog

  • Monday

    Monday: A 30 percent chance of rain, mainly after 3pm. Areas of dense fog before 11am. Otherwise, cloudy, with a high near 54. South wind 7 to 10 mph, with gusts as high as 16 mph.

    High: 54 °F

    Areas Dense
    Fog then
    Chance Rain

  • Monday Night

    Monday Night: Rain. Low around 47. South wind 3 to 8 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 47 °F

    Rain

  • Tuesday

    Tuesday: A 30 percent chance of rain after noon. Mostly cloudy, with a high near 58. West southwest wind 3 to 8 mph.

    High: 58 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 32. West wind 6 to 11 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 25 mph.

    Low: 32 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Mostly sunny, with a high near 41. Breezy, with a west wind 16 to 23 mph, with gusts as high as 31 mph.

    High: 41 °F

    Mostly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 23. West northwest wind 10 to 13 mph, with gusts as high as 20 mph.

    Low: 23 °F

    Partly Cloudy

  • Thanksgiving Day

    Thanksgiving Day: Sunny, with a high near 37.

    High: 37 °F

    Sunny

Detailed Forecast

Tonight
Patchy dense fog. Otherwise, mostly cloudy, with a low around 38. South southeast wind 5 to 7 mph.
Monday
A 30 percent chance of rain, mainly after 3pm. Areas of dense fog before 11am. Otherwise, cloudy, with a high near 54. South wind 7 to 10 mph, with gusts as high as 16 mph.
Monday Night
Rain. Low around 47. South wind 3 to 8 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday
A 30 percent chance of rain after noon. Mostly cloudy, with a high near 58. West southwest wind 3 to 8 mph.
Tuesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 32. West wind 6 to 11 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 25 mph.
Wednesday
Mostly sunny, with a high near 41. Breezy, with a west wind 16 to 23 mph, with gusts as high as 31 mph.
Wednesday Night
Partly cloudy, with a low around 23. West northwest wind 10 to 13 mph, with gusts as high as 20 mph.
Thanksgiving Day
Sunny, with a high near 37.
Thursday Night
Partly cloudy, with a low around 20.
Friday
Partly sunny, with a high near 38.
Friday Night
A chance of snow. Mostly cloudy, with a low around 25.
Saturday
A chance of rain and snow. Mostly cloudy, with a high near 39.
Saturday Night
Rain likely. Cloudy, with a low around 31.
Sunday
Rain likely. Mostly cloudy, with a high near 45.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Macon IL
 39.67°N 89.01°W (Elev. 643 ft)
Last Update:
11:36 pm CST Nov 23, 2025
Forecast Valid:
11pm CST Nov 23, 2025-6pm CST Nov 30, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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