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

56°F

13°C

Humidity 65%
Wind Speed S 7 mph
Barometer 30.04 in
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 9 Nov 3:55 pm CST
Extended Forecast for

Cortland IL

  • Tonight

    Tonight: Mostly clear, with a low around 41. South southwest wind 5 to 10 mph becoming northwest after midnight. Winds could gust as high as 15 mph.

    Low: 41 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 61. Northwest wind around 5 mph becoming calm in the afternoon.

    High: 61 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Mostly Cloudy

  • Veterans Day

    Veterans Day: A 40 percent chance of rain, mainly after noon. Mostly cloudy, with a high near 54. Light and variable wind becoming north 5 to 10 mph in the morning. Winds could gust as high as 15 mph.

    High: 54 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 36. North northwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 36 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of rain, mainly after noon. Mostly cloudy, with a high near 43. Breezy.

    High: 43 °F

    Chance Rain
    and Breezy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 41. South southwest wind 5 to 10 mph becoming northwest after midnight. Winds could gust as high as 15 mph.
Tuesday
Sunny, with a high near 61. Northwest wind around 5 mph becoming calm in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 38. Calm wind.
Veterans Day
A 40 percent chance of rain, mainly after noon. Mostly cloudy, with a high near 54. Light and variable wind becoming north 5 to 10 mph in the morning. Winds could gust as high as 15 mph.
Wednesday Night
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 36. North northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday
A 30 percent chance of rain, mainly after noon. Mostly cloudy, with a high near 43. Breezy.
Thursday Night
Partly cloudy, with a low around 27.
Friday
Mostly sunny, with a high near 41.
Friday Night
Mostly clear, with a low around 25.
Saturday
Sunny, with a high near 44.
Saturday Night
Mostly clear, with a low around 28.
Sunday
Sunny, with a high near 48.
Sunday Night
Partly cloudy, with a low around 35.
Monday
Mostly sunny, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Cortland IL
 41.92°N 88.67°W
Last Update:
2:46 pm CST Nov 9, 2026
Forecast Valid:
4pm CST Nov 9, 2026-6pm CST Nov 16, 2026
 
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