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    • Today

      Sep 25

      81° /51°
      Heavy 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
      More
    • Mon

      Sep 26

      64° /44°
      Clouds breaking and breezy
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Tue

      Sep 27

      63° /47°F
      Partly sunny and breezy
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
    • 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°
      Sunny much of the time
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More

    Day

    63°Hi RealFeel® 60° Precipitation 25%
    Breezy with sun and some clouds
    • W 14 mph
    • Gusts: 23 mph
    • Max UV Index: 4 (Moderate)
    • Thunderstorms: 3%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Night

    47°Lo RealFeel® 42° Precipitation 40%
    Mostly cloudy with a shower in the area
    • NW 7 mph
    • Gusts: 12 mph
    • Max UV Index: N/A
    • Thunderstorms: 3%
    • Precipitation: 0.02 in
    • Rain: 0.02 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 1 hrs
    • Hours of Rain: 1 hrs

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/27/2015
    High 63° 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 25, 2016; 8:43 AM ET

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

    Tue. Dust & Dander

    Tue. Wind Maps