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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 41.92°N 88.76°W (Text-Only)
NWS Forecast for: De Kalb IL
Issued by: National Weather Service Chicago, IL
Last Update: 4:06 am CST Dec 5, 2025		Print

  • Today

    Today: Partly sunny, with a high near 25. Wind chill values as low as -9. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 25 °F

    Partly Sunny


  • Tonight

    Tonight: Patchy snow and freezing rain before 3am. Mostly cloudy, with a low around 21. South southwest wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

    Low: 21 °F

    Patchy Wintry
    Mix

  • Saturday

    Saturday: Partly sunny, with a temperature falling to around 19 by 5pm. Northwest wind 5 to 10 mph becoming light and variable in the afternoon.

    High: 23 °F⇓

    Partly Sunny


  • Saturday
    Night

    Saturday Night: Snow, mainly after midnight. Low around 14. Calm wind becoming northeast around 5 mph after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 14 °F

    Chance Snow
    then Snow

  • Sunday

    Sunday: A 50 percent chance of snow before noon. Partly sunny, with a high near 22. North wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 22 °F

    Chance Snow
    then Mostly
    Sunny

  • Sunday
    Night

    Sunday Night: Mostly cloudy, with a low around 1.

    Low: 1 °F

    Mostly Cloudy


  • Monday

    Monday: Partly sunny, with a high near 19.

    High: 19 °F

    Partly Sunny


  • Monday
    Night

    Monday Night: A chance of snow. Mostly cloudy, with a low around 12.

    Low: 12 °F

    Chance Snow


  • Tuesday

    Tuesday: Mostly cloudy, with a high near 34.

    High: 34 °F

    Mostly Cloudy




    • Today: Partly sunny, with a high near 25. Wind chill values as low as -9. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    Tonight: Patchy snow and freezing rain before 3am. Mostly cloudy, with a low around 21. South southwest wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 30%.

    Saturday: Partly sunny, with a temperature falling to around 19 by 5pm. Northwest wind 5 to 10 mph becoming light and variable in the afternoon.

    Saturday Night: Snow, mainly after midnight. Low around 14. Calm wind becoming northeast around 5 mph after midnight. Winds could gust as high as 10 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Sunday: A 50 percent chance of snow before noon. Partly sunny, with a high near 22. North wind 5 to 10 mph, with gusts as high as 20 mph.

    Sunday Night: Mostly cloudy, with a low around 1.

    Monday: Partly sunny, with a high near 19.

    Monday Night: A chance of snow. Mostly cloudy, with a low around 12.

    Tuesday: Mostly cloudy, with a high near 34.

    Tuesday Night: Snow likely. Cloudy, with a low around 27.

    Wednesday: A chance of rain and snow. Mostly cloudy, with a high near 34.

    Wednesday Night: A chance of snow. Mostly cloudy, with a low around 10.

    Thursday: Partly sunny, with a high near 20.


    De Kalb IL
     41.92°N 88.76°W

    Visit your local NWS office at: https://www.weather.gov/lot