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.

Fog

52°F

11°C

Humidity 100%
Wind Speed Calm
Barometer 30.04 in (1017.2 mb)
Dewpoint 52°F (11°C)
Visibility 0.25 mi
Last update 25 Dec 1:54 am CST
Extended Forecast for

Decatur IL

Dense Fog Advisory December 25, 02:16am until December 25, 10:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory December 25, 02:16am until December 25, 10:00am

    NOW until 10:00am Thu

    Dense Fog Advisory

  • Overnight

    Low: 52 °F

    Slight Chance
    Drizzle and
    Dense Fog

  • Christmas Day

    Christmas Day: A slight chance of drizzle before noon. Areas of dense fog before 11am. Otherwise, cloudy, with a high near 54. North northeast wind 5 to 9 mph becoming east in the afternoon.

    High: 54 °F

    Slight Chance
    Drizzle and
    Areas Dense
    Fog then
    Cloudy

  • Thursday Night

    Thursday Night: A 20 percent chance of rain after midnight. Patchy fog. Otherwise, cloudy, with a low around 49. East wind around 10 mph becoming south after midnight. Winds could gust as high as 17 mph.

    Low: 49 °F

    Patchy Fog
    then Slight
    Chance Rain
    and Areas Fog

  • Friday

    Friday: Areas of fog before noon. Otherwise, partly sunny, with a high near 64. South wind 7 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 64 °F

    Areas Fog
    then Partly
    Sunny

  • Friday Night

    Friday Night: Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 42. Northwest wind around 6 mph becoming calm in the evening.

    Low: 42 °F

    Partly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 60. Southeast wind 5 to 10 mph, with gusts as high as 17 mph.

    High: 60 °F

    Patchy Fog
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 52. Southeast wind around 11 mph becoming south southwest after midnight. Winds could gust as high as 18 mph.

    Low: 52 °F

    Mostly Cloudy

  • Sunday

    Sunday: Rain likely, mainly after noon. Cloudy, with a high near 61. Chance of precipitation is 70%.

    High: 61 °F

    Rain Likely

Detailed Forecast

Overnight
A slight chance of drizzle. Widespread dense fog. Otherwise, cloudy, with a steady temperature around 52. Light north wind.
Christmas Day
A slight chance of drizzle before noon. Areas of dense fog before 11am. Otherwise, cloudy, with a high near 54. North northeast wind 5 to 9 mph becoming east in the afternoon.
Thursday Night
A 20 percent chance of rain after midnight. Patchy fog. Otherwise, cloudy, with a low around 49. East wind around 10 mph becoming south after midnight. Winds could gust as high as 17 mph.
Friday
Areas of fog before noon. Otherwise, partly sunny, with a high near 64. South wind 7 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 42. Northwest wind around 6 mph becoming calm in the evening.
Saturday
Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 60. Southeast wind 5 to 10 mph, with gusts as high as 17 mph.
Saturday Night
Mostly cloudy, with a low around 52. Southeast wind around 11 mph becoming south southwest after midnight. Winds could gust as high as 18 mph.
Sunday
Rain likely, mainly after noon. Cloudy, with a high near 61. Chance of precipitation is 70%.
Sunday Night
A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 17. Blustery.
Monday
Sunny, with a high near 24. Blustery.
Monday Night
Mostly clear, with a low around 14.
Tuesday
Mostly sunny, with a high near 29.
Tuesday Night
Partly cloudy, with a low around 19.
Wednesday
Partly sunny, with a high near 35.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.86°N 88.94°W (Elev. 682 ft)
Last Update:
1:58 am CST Dec 25, 2025
Forecast Valid:
2am CST Dec 25, 2025-6pm CST Dec 31, 2025
 
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