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.

Overcast

48°F

9°C

Humidity 93%
Wind Speed NE 14 mph
Barometer 30.03 in (1017.0 mb)
Dewpoint 46°F (8°C)
Visibility 7.00 mi
Wind Chill42°F (6°C)
Last update 18 Nov 8:54 pm CST
Extended Forecast for

Decatur Airport IL

  • Tonight

    Tonight: Cloudy, with a low around 42. North northeast wind around 7 mph.

    Low: 42 °F

    Cloudy

  • Wednesday

    Wednesday: Cloudy, with a high near 53. Northeast wind 5 to 7 mph becoming calm in the afternoon.

    High: 53 °F

    Cloudy

  • Wednesday Night

    Wednesday Night: Cloudy, with a low around 41. Light and variable wind.

    Low: 41 °F

    Cloudy

  • Thursday

    Thursday: A 50 percent chance of rain. Cloudy, with a high near 58. Light south southeast wind becoming south 5 to 9 mph in the morning.

    High: 58 °F

    Chance Rain

  • Thursday Night

    Thursday Night: A 40 percent chance of rain. Cloudy, with a low around 46. South wind around 6 mph becoming light and variable.

    Low: 46 °F

    Chance Rain

  • Friday

    Friday: Rain likely, mainly after noon. Cloudy, with a high near 56. Northeast wind 6 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    High: 56 °F

    Rain Likely

  • Friday Night

    Friday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 40. Northeast wind 7 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 40 °F

    Rain Likely
    then Chance
    Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

Detailed Forecast

Tonight
Cloudy, with a low around 42. North northeast wind around 7 mph.
Wednesday
Cloudy, with a high near 53. Northeast wind 5 to 7 mph becoming calm in the afternoon.
Wednesday Night
Cloudy, with a low around 41. Light and variable wind.
Thursday
A 50 percent chance of rain. Cloudy, with a high near 58. Light south southeast wind becoming south 5 to 9 mph in the morning.
Thursday Night
A 40 percent chance of rain. Cloudy, with a low around 46. South wind around 6 mph becoming light and variable.
Friday
Rain likely, mainly after noon. Cloudy, with a high near 56. Northeast wind 6 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 40. Northeast wind 7 to 10 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Mostly sunny, with a high near 56.
Saturday Night
Mostly clear, with a low around 36.
Sunday
Sunny, with a high near 60.
Sunday Night
Partly cloudy, with a low around 39.
Monday
Mostly sunny, with a high near 59.
Monday Night
A chance of rain. Mostly cloudy, with a low around 40.
Tuesday
A chance of rain. Mostly cloudy, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Decatur Airport IL
 39.84°N 88.85°W (Elev. 686 ft)
Last Update:
8:36 pm CST Nov 18, 2025
Forecast Valid:
9pm CST Nov 18, 2025-6pm CST Nov 25, 2025
 
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