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Personalized Forecasts

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    • Today

      Sep 26

      66° /46°F
      Breezy with clouds, then sun
      • Neutral
      • weather for sinus headaches
      • Hi RealFeel: 65°
      • UV: 4 - Moderate
      • Cloud Cover: 15%
    • Tue

      Sep 27

      63° /47°
      Mostly sunny and breezy
      • Neutral
      • weather for sinus headaches
      • Hi RealFeel: 62°
      • UV: 4 - Moderate
      • Cloud Cover: 17%
      More
    • Wed

      Sep 28

      61° /52°
      A morning shower in spots
      • Neutral
      • weather for sinus headaches
      • Hi RealFeel: 59°
      • UV: 4 - Moderate
      • Cloud Cover: 70%
      More
    • Thu

      Sep 29

      66° /51°
      Mostly sunny and breezy
      • Beneficial
      • weather for sinus headaches
      • Hi RealFeel: 65°
      • UV: 4 - Moderate
      • Cloud Cover: 20%
      More
    • Fri

      Sep 30

      67° /51°
      Rather cloudy, showers around
      • Neutral
      • weather for sinus headaches
      • Hi RealFeel: 68°
      • UV: 4 - Moderate
      • Cloud Cover: 76%
      More

    Day

    66°Hi RealFeel® 65° Precipitation 9%
    Breezy with clouds giving way to sun
    • W 15 mph
    • Gusts: 23 mph
    • Max UV Index: 5 (Moderate)
    • Thunderstorms: 0%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Night

    46°Lo RealFeel® 41° Precipitation 8%
    Mainly clear
    • WSW 9 mph
    • Gusts: 15 mph
    • Max UV Index: N/A
    • Thunderstorms: 0%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    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. Sinus Headache

    Mon. UV Index