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    • Today

      Sep 26

      66° /46°F
      Breezy with clouds, then sun
      • 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
    • Tue

      Sep 27

      63° /47°
      Mostly sunny and breezy
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Wed

      Sep 28

      61° /51°
      A morning shower in spots
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Thu

      Sep 29

      66° /52°
      A passing morning shower
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Fri

      Sep 30

      67° /51°
      Cloudy with spotty showers
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    Monday
    10am
    11am
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    5pm
    Forecast Mostly Sunny Mostly Sunny Sunny Sunny Mostly Sunny Mostly Sunny Mostly Sunny Mostly Sunny
    Temp (°F) 60° 62° 63° 65° 65° 66° 65° 64°
    RealFeel® 57° 61° 62° 64° 65° 65° 63° 60°
    Wind (mph) 15 W 16 W 17 W 18 W 18 W 18 W 18 W 17 W
    precip
    10am
    11am
    12pm
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    5pm
    Rain
    0%
    0%
    0%
    0%
    1%
    1%
    1%
    1%
    Snow
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    Ice
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    SKY
    10am
    11am
    12pm
    1pm
    2pm
    3pm
    4pm
    5pm
    UV Index 2 3 4 5 4 3 2 1
    Cloud Cover 17% 14% 7% 6% 11% 11% 11% 11%
    Humidity 57% 53% 48% 44% 41% 39% 39% 42%
    Dew Point 45° 45° 43° 42° 41° 41° 40° 40°
    Temp °F
    10am
    11am
    12pm
    1pm
    2pm
    3pm
    4pm
    5pm
    70° 65° 60°

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/26/2015
    High 66° 71° N/A 74°
    Low 46° 50° N/A 56°

    Sunrise/Sunset

    • Sunrise: 6:46 AM
    • Sunset: 6:42 PM
    • Duration: 11:56 hr

    Moonrise/Moonset

    • Moonrise: 2:20 AM
    • Moonset: 4:34 PM
    • Duration: 14:14 hr
    Astronomy

    Crystal Lake Weather Report

    Chilly winds to howl across Great Lakes early this week

    September 26, 2016; 3:03 AM ET

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

    Mon. Pollen

    Mon. Dust & Dander

    Mon. Wind Maps