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: 2:06 pm CDT Jul 13, 2025		Print

  • This
    Afternoon

    This Afternoon: Partly sunny, with a high near 26. West wind 10 to 15 km/h.

    High: 26 °C

    Partly Sunny



  • Tonight

    Tonight: Partly cloudy, with a low around 17. West wind 5 to 10 km/h becoming south southwest in the evening.

    Low: 17 °C

    Partly Cloudy



  • Monday

    Monday: Sunny, with a high near 29. West southwest wind 5 to 10 km/h.

    High: 29 °C

    Sunny



  • Monday
    Night

    Monday Night: Mostly clear, with a low around 18. Calm wind.

    Low: 18 °C

    Mostly Clear



  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 31. South wind 5 to 10 km/h, with gusts as high as 20 km/h.

    High: 31 °C

    Sunny then
    Slight Chance
    T-storms

  • Tuesday
    Night

    Tuesday Night: A slight chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers after 4am. Partly cloudy, with a low around 21. Chance of precipitation is 20%.

    Low: 21 °C

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 7am. Partly sunny, with a high near 31. Chance of precipitation is 40%.

    High: 31 °C

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday
    Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 21.

    Low: 21 °C

    Chance
    T-storms


  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 28.

    High: 28 °C

    Chance
    Showers then
    Chance
    T-storms



    • This Afternoon: Partly sunny, with a high near 26. West wind 10 to 15 km/h.

    Tonight: Partly cloudy, with a low around 17. West wind 5 to 10 km/h becoming south southwest in the evening.

    Monday: Sunny, with a high near 29. West southwest wind 5 to 10 km/h.

    Monday Night: Mostly clear, with a low around 18. Calm wind.

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 31. South wind 5 to 10 km/h, with gusts as high as 20 km/h.

    Tuesday Night: A slight chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers after 4am. Partly cloudy, with a low around 21. Chance of precipitation is 20%.

    Wednesday: A chance of showers, with thunderstorms also possible after 7am. Partly sunny, with a high near 31. Chance of precipitation is 40%.

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 21.

    Thursday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 28.

    Thursday Night: A chance of showers before 1am. Mostly cloudy, with a low around 17.

    Friday: Partly sunny, with a high near 26.

    Friday Night: Partly cloudy, with a low around 17.

    Saturday: A chance of showers. Partly sunny, with a high near 28.


    De Kalb IL
     41.92°N 88.76°W

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