7-Day Forecast 41.94°N 88.76°W (Text-Only)
NWS Forecast for: De Kalb IL
Issued by: National Weather Service Chicago, IL
Last Update: 12:42 pm CDT Jul 13, 2025
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  • This
    Afternoon

    This Afternoon: Partly sunny, with a high near 80. West wind 5 to 10 mph.

    High: 80 °F

    Partly Sunny



  • Tonight

    Tonight: Partly cloudy, with a low around 64. Calm wind becoming south southwest around 5 mph after midnight.

    Low: 64 °F

    Partly Cloudy



  • Monday

    Monday: Sunny, with a high near 86. West southwest wind around 5 mph.

    High: 86 °F

    Sunny



  • Monday
    Night

    Monday Night: Mostly clear, with a low around 65. Calm wind becoming south southeast around 5 mph after midnight.

    Low: 65 °F

    Mostly Clear



  • Tuesday

    Tuesday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm.  Mostly sunny, with a high near 87. South wind around 5 mph, with gusts as high as 15 mph.  Chance of precipitation is 20%.

    High: 87 °F

    Sunny then
    Slight Chance
    T-storms

  • Tuesday
    Night

    Tuesday Night: A slight chance of thunderstorms before 7pm.  Partly cloudy, with a low around 69. Chance of precipitation is 10%.

    Low: 69 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm.  Mostly sunny, with a high near 88. Chance of precipitation is 50%.

    High: 88 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Wednesday
    Night

    Wednesday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 65.

    Low: 65 °F

    Chance
    T-storms


  • Thursday

    Thursday: A chance of showers and thunderstorms after 1pm.  Mostly cloudy, with a high near 80.

    High: 80 °F

    Mostly Cloudy
    then Chance
    T-storms



  • This Afternoon: Partly sunny, with a high near 80. West wind 5 to 10 mph.

    Tonight: Partly cloudy, with a low around 64. Calm wind becoming south southwest around 5 mph after midnight.

    Monday: Sunny, with a high near 86. West southwest wind around 5 mph.

    Monday Night: Mostly clear, with a low around 65. Calm wind becoming south southeast around 5 mph after midnight.

    Tuesday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 87. South wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 20%.

    Tuesday Night: A slight chance of thunderstorms before 7pm. Partly cloudy, with a low around 69. Chance of precipitation is 10%.

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Chance of precipitation is 50%.

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 65.

    Thursday: A chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 80.

    Thursday Night: Partly cloudy, with a low around 60.

    Friday: Mostly sunny, with a high near 79.

    Friday Night: Partly cloudy, with a low around 61.

    Saturday: A chance of showers. Partly sunny, with a high near 81.



    De Kalb IL
     41.94°N 88.76°W

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