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    • Tonight

      Sep 26

      47° Lo
      Mainly clear
      • Ragweed Pollen
        • Ragweed Pollen
        • Grass Pollen
        • Tree Pollen
        • Mold
        • Dust & Dander
        • Air Quality Index
      • Ragweed Pollen
      • Weather
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Tue

      Sep 27

      64° /47°F
      Turning out cloudy and breezy
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
    • Wed

      Sep 28

      61° /52°
      An a.m. shower; mostly cloudy
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Thu

      Sep 29

      68° /53°
      A shower in the morning
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Fri

      Sep 30

      66° /56°
      Cloudy with spotty showers
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    64°/58° RealFeel® 62°/54°
    Mostly cloudy
    • 14 mph
    • Precipitation: 25%
    • Rain: 0 in
    • Snow: 0 in
    • Humidity: 48%
    • Cloud Cover: 76%
    • Dew Point: 42° F
    • Visibility: 10 mi

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/27/2015
    High 64° 70° N/A 73°
    Low 47° 49° N/A 59°

    Sunrise/Sunset

    • Sunrise: 6:47 AM
    • Sunset: 6:40 PM
    • Duration: 11:53 hr

    Moonrise/Moonset

    • Moonrise: 3:21 AM
    • Moonset: 5:10 PM
    • Duration: 13:49 hr
    Astronomy

    Crystal Lake Weather Report

    Chilly winds to howl across Great Lakes early this week

    September 26, 2016; 4:43 PM ET

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

    Tue. Pollen

    Tue. Dust & Dander

    Tue. Wind Maps