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

58°F

14°C

Humidity 49%
Wind Speed NW 17 G 25 mph
Barometer 30.03 in
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 5 Nov 11:35 am CST
Extended Forecast for

Cortland IL

  • Today

    Today: Sunny, with a temperature falling to around 51 by 5pm. Breezy, with a north northwest wind 15 to 20 mph decreasing to 10 to 15 mph in the afternoon. Winds could gust as high as 35 mph.

    High: 58 °F⇓

    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 31. Northwest wind 5 to 10 mph becoming light west northwest after midnight.

    Low: 31 °F

    Mostly Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 56. Light and variable wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 20 mph.

    High: 56 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Showers, mainly after midnight. Low around 47. South southeast wind 10 to 15 mph becoming southwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%.

    Low: 47 °F

    Chance
    Showers then
    Showers

  • Friday

    Friday: A 20 percent chance of showers before noon. Mostly sunny, with a high near 63. West wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 63 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

  • Saturday

    Saturday: A 50 percent chance of rain after noon. Partly sunny, with a high near 48.

    High: 48 °F

    Partly Sunny
    then Chance
    Rain

  • Saturday Night

    Saturday Night: Rain likely before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 29.

    Low: 29 °F

    Rain Likely
    then Chance
    Rain/Snow

  • Sunday

    Sunday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a temperature falling to around 51 by 5pm. Breezy, with a north northwest wind 15 to 20 mph decreasing to 10 to 15 mph in the afternoon. Winds could gust as high as 35 mph.
Tonight
Mostly clear, with a low around 31. Northwest wind 5 to 10 mph becoming light west northwest after midnight.
Thursday
Increasing clouds, with a high near 56. Light and variable wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 20 mph.
Thursday Night
Showers, mainly after midnight. Low around 47. South southeast wind 10 to 15 mph becoming southwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%.
Friday
A 20 percent chance of showers before noon. Mostly sunny, with a high near 63. West wind 10 to 15 mph, with gusts as high as 25 mph.
Friday Night
Partly cloudy, with a low around 34.
Saturday
A 50 percent chance of rain after noon. Partly sunny, with a high near 48.
Saturday Night
Rain likely before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 29.
Sunday
Mostly sunny, with a high near 36.
Sunday Night
Partly cloudy, with a low around 20.
Monday
Sunny, with a high near 36.
Monday Night
Partly cloudy, with a low around 20.
Veterans Day
Partly sunny, with a high near 42.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Cortland IL
 41.92°N 88.7°W
Last Update:
11:31 am CST Nov 5, 2025
Forecast Valid:
11am CST Nov 5, 2025-6pm CST Nov 11, 2025
 
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Additional Resources

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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