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    • Today

      Sep 25

      81° /51°F
      Rain and a thunderstorm
      • Ragweed Pollen
        • Ragweed Pollen
        • Grass Pollen
        • Tree Pollen
        • Mold
        • Dust & Dander
        • Air Quality Index
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
    • Mon

      Sep 26

      64° /46°
      Clouds breaking and windy
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Tue

      Sep 27

      63° /48°
      Partly sunny and breezy
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Wed

      Sep 28

      62° /48°
      A morning shower in spots
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Thu

      Sep 29

      68° /49°
      Mostly sunny
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    81°/71° RealFeel® 84°/66°
    Periods of rain and a thunderstorm
    • 12 mph
    • Precipitation: 65%
    • Rain: 0.19 in
    • Snow: 0 in
    • Humidity: 72%
    • Cloud Cover: 91%
    • Dew Point: 68° F
    • Visibility: 7 mi

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/25/2015
    High 81° 71° N/A 70°
    Low 51° 50° N/A 58°

    Sunrise/Sunset

    • Sunrise: 6:45 AM
    • Sunset: 6:44 PM
    • Duration: 11:59 hr

    Moonrise/Moonset

    • Moonrise: 1:19 AM
    • Moonset: 3:55 PM
    • Duration: 14:36 hr
    Astronomy

    Crystal Lake Weather Report

    Chilly winds to howl across Great Lakes early this week

    September 25, 2016; 6:43 AM ET

    Gusty winds will accompany a push of chilly air across the Great Lakes from Sunday night through Tuesday. More >

    Sun. Pollen

    Sun. Dust & Dander

    Sun. Wind Maps