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

Hazardous Weather Conditions

Current conditions at

De Kalb Taylor Municipal Airport (KDKB)

Lat: 41.93°NLon: 88.71°WElev: 909ft.

Overcast

60°F

16°C

Humidity 81%
Wind Speed E 5 mph
Barometer 30.01 in
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 23 May 10:15 pm CDT
Extended Forecast for

Cortland IL

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly after 11pm. Cloudy, with a low around 56. East southeast wind around 5 mph becoming south southwest after midnight.

    Low: 56 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms, mainly before 8am. Mostly cloudy through mid morning, then gradual clearing, with a high near 79. West northwest wind around 5 mph, with gusts as high as 15 mph.

    High: 79 °F

    Chance
    T-storms then
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 56. West southwest wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Clear

  • Memorial Day

    Memorial Day: Sunny, with a high near 84. South wind 5 to 10 mph.

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 60. South southeast wind around 5 mph, with gusts as high as 10 mph.

    Low: 60 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 62.

    Low: 62 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers. Partly sunny, with a high near 82.

    High: 82 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers before 1am. Mostly cloudy, with a low around 59.

    Low: 59 °F

    Chance
    Showers

Detailed Forecast

Tonight
A 40 percent chance of showers and thunderstorms, mainly after 11pm. Cloudy, with a low around 56. East southeast wind around 5 mph becoming south southwest after midnight.
Sunday
A 40 percent chance of showers and thunderstorms, mainly before 8am. Mostly cloudy through mid morning, then gradual clearing, with a high near 79. West northwest wind around 5 mph, with gusts as high as 15 mph.
Sunday Night
Mostly clear, with a low around 56. West southwest wind around 5 mph becoming calm in the evening.
Memorial Day
Sunny, with a high near 84. South wind 5 to 10 mph.
Monday Night
Partly cloudy, with a low around 60. South southeast wind around 5 mph, with gusts as high as 10 mph.
Tuesday
Mostly sunny, with a high near 85.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 62.
Wednesday
A chance of showers. Partly sunny, with a high near 82.
Wednesday Night
A chance of showers before 1am. Mostly cloudy, with a low around 59.
Thursday
Partly sunny, with a high near 81.
Thursday Night
Mostly cloudy, with a low around 56.
Friday
Partly sunny, with a high near 76.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Mostly sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Cortland IL
 41.92°N 88.67°W
Last Update:
9:06 pm CDT May 23, 2026
Forecast Valid:
10pm CDT May 23, 2026-6pm CDT May 30, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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