National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

47°F

8°C

Humidity 71%
Wind Speed S 14 mph
Barometer 29.92 in (1013.4 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 7 Jan 10:54 pm CST
Extended Forecast for

2 Miles NNE Decatur Airport IL

  • Tonight

    Tonight: Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 41. South wind around 11 mph, with gusts as high as 22 mph.

    Low: 41 °F

    Patchy Fog

  • Thursday

    Thursday: A chance of rain before noon, then showers likely after noon. Patchy fog before 8am. Otherwise, cloudy, with a high near 62. Breezy, with a south southeast wind 13 to 21 mph, with gusts as high as 36 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 62 °F

    Showers
    Likely and
    Patchy Fog

  • Thursday Night

    Thursday Night: Rain and possibly a thunderstorm before 3am, then rain likely. Low around 49. Breezy, with a south wind 15 to 24 mph becoming west southwest after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 49 °F

    Breezy. Rain
    then Rain
    Likely

  • Friday

    Friday: Mostly cloudy, with a temperature falling to around 48 by 5pm. West southwest wind 8 to 14 mph becoming north in the afternoon. Winds could gust as high as 22 mph.

    High: 56 °F⇓

    Mostly Cloudy

  • Friday Night

    Friday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 37. Northeast wind 6 to 8 mph.

    Low: 37 °F

    Mostly Cloudy
    then Chance
    Rain

  • Saturday

    Saturday: A chance of rain before noon, then a chance of rain and snow. Cloudy, then gradually becoming mostly sunny, with a high near 42. West northwest wind 9 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.

    High: 42 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 20. West wind 16 to 18 mph, with gusts as high as 25 mph.

    Low: 20 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 31.

    High: 31 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 20.

    Low: 20 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 41. South wind around 11 mph, with gusts as high as 22 mph.
Thursday
A chance of rain before noon, then showers likely after noon. Patchy fog before 8am. Otherwise, cloudy, with a high near 62. Breezy, with a south southeast wind 13 to 21 mph, with gusts as high as 36 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Rain and possibly a thunderstorm before 3am, then rain likely. Low around 49. Breezy, with a south wind 15 to 24 mph becoming west southwest after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Mostly cloudy, with a temperature falling to around 48 by 5pm. West southwest wind 8 to 14 mph becoming north in the afternoon. Winds could gust as high as 22 mph.
Friday Night
A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 37. Northeast wind 6 to 8 mph.
Saturday
A chance of rain before noon, then a chance of rain and snow. Cloudy, then gradually becoming mostly sunny, with a high near 42. West northwest wind 9 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.
Saturday Night
Mostly cloudy, with a low around 20. West wind 16 to 18 mph, with gusts as high as 25 mph.
Sunday
Partly sunny, with a high near 31.
Sunday Night
Mostly clear, with a low around 20.
Monday
Mostly sunny, with a high near 41.
Monday Night
Partly cloudy, with a low around 29.
Tuesday
Partly sunny, with a high near 45.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
A chance of rain. Mostly cloudy, with a high near 38.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNE Decatur Airport IL
 39.86°N 88.85°W (Elev. 682 ft)
Last Update:
9:36 pm CST Jan 7, 2026
Forecast Valid:
11pm CST Jan 7, 2026-6pm CST Jan 14, 2026
 
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