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

De Kalb Taylor Municipal Airport (KDKB)

Lat: 41.93°NLon: 88.71°WElev: 909ft.

Fair

70°F

21°C

Humidity 41%
Wind Speed NW 10 G 18 mph
Barometer 30.19 in
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 4 Oct 2:15 pm CDT
Extended Forecast for

Cortland IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 71. Northwest wind 10 to 15 mph.

    High: 71 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 42. Northwest wind around 5 mph, with gusts as high as 10 mph.

    Low: 42 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 66. North wind around 5 mph becoming calm in the afternoon.

    High: 66 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 45. Calm wind becoming south southeast around 5 mph in the evening. Winds could gust as high as 10 mph.

    Low: 45 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 71. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 71 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 70.

    High: 70 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 71. Northwest wind 10 to 15 mph.
Tonight
Clear, with a low around 42. Northwest wind around 5 mph, with gusts as high as 10 mph.
Monday
Sunny, with a high near 66. North wind around 5 mph becoming calm in the afternoon.
Monday Night
Clear, with a low around 45. Calm wind becoming south southeast around 5 mph in the evening. Winds could gust as high as 10 mph.
Tuesday
Sunny, with a high near 71. South wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 53.
Wednesday
Mostly sunny, with a high near 73.
Wednesday Night
Partly cloudy, with a low around 48.
Thursday
Mostly sunny, with a high near 70.
Thursday Night
Partly cloudy, with a low around 48.
Friday
Mostly sunny, with a high near 69.
Friday Night
Mostly clear, with a low around 48.
Saturday
Sunny, with a high near 72.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Cortland IL
 41.94°N 88.7°W
Last Update:
1:21 pm CDT Oct 4, 2026
Forecast Valid:
2pm CDT Oct 4, 2026-6pm CDT Oct 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