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.

Overcast

57°F

14°C

Humidity 74%
Wind Speed W 14 G 23 mph
Barometer 29.77 in (1007.9 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 4 Nov 2:54 pm CST
Extended Forecast for

Decatur Airport IL

  • This Afternoon

    This Afternoon: A slight chance of drizzle. Cloudy, with a high near 60. West southwest wind 11 to 15 mph, with gusts as high as 21 mph.

    High: 60 °F

    Slight Chance
    Drizzle

  • Tonight

    Tonight: Patchy drizzle, mainly between 7pm and 10pm. Mostly cloudy, with a low around 45. West southwest wind 8 to 11 mph, with gusts as high as 16 mph.

    Low: 45 °F

    Patchy
    Drizzle then
    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 58. West southwest wind 9 to 16 mph, with gusts as high as 22 mph.

    High: 58 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 40. West wind 6 to 10 mph becoming north after midnight.

    Low: 40 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 51. North wind 9 to 14 mph, with gusts as high as 18 mph.

    High: 51 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 30. North wind 5 to 8 mph becoming calm in the evening.

    Low: 30 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 52. Calm wind becoming north northwest 5 to 7 mph in the morning.

    High: 52 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

Detailed Forecast

This Afternoon
A slight chance of drizzle. Cloudy, with a high near 60. West southwest wind 11 to 15 mph, with gusts as high as 21 mph.
Tonight
Patchy drizzle, mainly between 7pm and 10pm. Mostly cloudy, with a low around 45. West southwest wind 8 to 11 mph, with gusts as high as 16 mph.
Thursday
Partly sunny, with a high near 58. West southwest wind 9 to 16 mph, with gusts as high as 22 mph.
Thursday Night
Mostly cloudy, with a low around 40. West wind 6 to 10 mph becoming north after midnight.
Friday
Partly sunny, with a high near 51. North wind 9 to 14 mph, with gusts as high as 18 mph.
Friday Night
Mostly clear, with a low around 30. North wind 5 to 8 mph becoming calm in the evening.
Saturday
Sunny, with a high near 52. Calm wind becoming north northwest 5 to 7 mph in the morning.
Saturday Night
Mostly clear, with a low around 29.
Sunday
Sunny, with a high near 58.
Sunday Night
Mostly clear, with a low around 32.
Monday
Sunny, with a high near 64.
Monday Night
Clear, with a low around 37.
Tuesday
Sunny, with a high near 64.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Decatur Airport IL
 39.84°N 88.85°W (Elev. 686 ft)
Last Update:
2:21 pm CST Nov 4, 2026
Forecast Valid:
3pm CST Nov 4, 2026-6pm CST Nov 10, 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