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    • Today

      Sep 26

      66° /47°F
      Mostly sunny and breezy
      • 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

      64° /47°
      Turning out cloudy and breezy
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • 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
    Monday
    9pm
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    Forecast Mostly Clear Mostly Clear Mostly Clear Mostly Clear Mostly Clear Mostly Clear Mostly Clear Mostly Clear
    Temp (°F) 55° 54° 52° 52° 51° 50° 49° 49°
    RealFeel® 51° 50° 48° 48° 47° 45° 44° 43°
    Wind (mph) 9 WSW 8 WSW 8 WSW 8 WSW 8 WSW 9 WSW 9 WSW 9 WSW
    precip
    9pm
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    Rain
    0%
    0%
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    0%
    0%
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    Snow
    0%
    0%
    0%
    0%
    0%
    0%
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    0%
    Ice
    0%
    0%
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    0%
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    SKY
    9pm
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    12am
    1am
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    4am
    UV Index 0 0 0 0 0 0 0 0
    Cloud Cover 11% 11% 11% 11% 11% 11% 11% 11%
    Humidity 63% 66% 68% 72% 74% 74% 76% 78%
    Dew Point 43° 43° 42° 43° 43° 42° 42° 42°
    Temp °F
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    60° 55° 50° 45°

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/26/2015
    High 66° 71° N/A 74°
    Low 47° 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; 4:43 PM ET

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

    Mon. Pollen

    Mon. Dust & Dander

    Mon. Wind Maps