National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 42.23°N 88.36°W (Text-Only)
NWS Forecast for: Crystal Lake IL
Issued by: National Weather Service Chicago, IL
Last Update: 3:56 am CDT May 17, 2026		Print

  • Today

    Today: A chance of showers and thunderstorms before noon, then a slight chance of showers between noon and 2pm. Mostly cloudy, with a high near 82. Breezy, with an east southeast wind 10 to 15 mph becoming south 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 40%.

    High: 82 °F

    Chance
    Showers and
    Breezy


  • Tonight

    Tonight: Partly cloudy, with a low around 68. South wind around 15 mph, with gusts as high as 25 mph.

    Low: 68 °F

    Partly Cloudy




  • Monday

    Monday: A chance of showers and thunderstorms before 9am, then showers likely and possibly a thunderstorm between 9am and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 82. Breezy, with a south southwest wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 82 °F

    Showers
    Likely and
    Breezy


  • Monday
    Night

    Monday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.

    Low: 66 °F

    Chance
    Showers then
    Showers
    Likely and
    Breezy

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Mostly cloudy, with a high near 80. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 60%.

    High: 80 °F

    Showers
    Likely and
    Breezy


  • Tuesday
    Night

    Tuesday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy




  • Wednesday

    Wednesday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny




  • Wednesday
    Night

    Wednesday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy




  • Thursday

    Thursday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny






    • Today: A chance of showers and thunderstorms before noon, then a slight chance of showers between noon and 2pm. Mostly cloudy, with a high near 82. Breezy, with an east southeast wind 10 to 15 mph becoming south 15 to 20 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 40%.

    Tonight: Partly cloudy, with a low around 68. South wind around 15 mph, with gusts as high as 25 mph.

    Monday: A chance of showers and thunderstorms before 9am, then showers likely and possibly a thunderstorm between 9am and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 82. Breezy, with a south southwest wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Monday Night: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.

    Tuesday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers after 4pm. Mostly cloudy, with a high near 80. Breezy, with a south southwest wind 20 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 60%.

    Tuesday Night: Mostly cloudy, with a low around 48.

    Wednesday: Mostly sunny, with a high near 62.

    Wednesday Night: Partly cloudy, with a low around 42.

    Thursday: Mostly sunny, with a high near 62.

    Thursday Night: Partly cloudy, with a low around 46.

    Friday: Partly sunny, with a high near 68.

    Friday Night: Mostly cloudy, with a low around 50.

    Saturday: Partly sunny, with a high near 74.


    Crystal Lake IL
     42.23°N 88.36°W

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