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    • Tonight

      Sep 25

      54° Lo F
      Cloudy, a shower or t-storm
      • Asthma
      • Weather
      • Hi RealFeel: 87°
      • UV: 4 - Moderate
      • Air Qual.: Moderate
    • Mon

      Sep 26

      66° /47°
      Breezy with clouds and sun
      • Neutral
      • weather for asthma
      • Hi RealFeel: 65°
      • UV: 4 - Moderate
      • Air Qual.: Good
      More
    • Tue

      Sep 27

      63° /49°
      Sunshine and some clouds
      • Beneficial
      • weather for asthma
      • Hi RealFeel: 62°
      • UV: 4 - Moderate
      • Air Qual.: Good
      More
    • Wed

      Sep 28

      63° /53°
      A morning shower in places
      • Beneficial
      • weather for asthma
      • Hi RealFeel: 61°
      • UV: 4 - Moderate
      • Air Qual.: Good
      More
    • Thu

      Sep 29

      67° /54°
      Mostly sunny
      • Beneficial
      • weather for asthma
      • Hi RealFeel: 70°
      • UV: 4 - Moderate
      • Air Qual.: Good
      More

    Day

    81°Hi RealFeel® 87° Precipitation 55%
    Turning cloudy and warmer; periods of rain and a thunderstorm this afternoon
    • SSW 10 mph
    • Gusts: 23 mph
    • Max UV Index: 4 (Moderate)
    • Thunderstorms: 60%
    • Precipitation: 0.22 in
    • Rain: 0.22 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 2 hrs
    • Hours of Rain: 2 hrs

    Night

    54°Lo RealFeel® 51° Precipitation 60%
    Considerable cloudiness with a shower or thunderstorm around until after midnight
    • W 8 mph
    • Gusts: 12 mph
    • Max UV Index: N/A
    • Thunderstorms: 42%
    • Precipitation: 0.25 in
    • Rain: 0.25 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 1.5 hrs
    • Hours of Rain: 1.5 hrs

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/25/2015
    High 81° 69° N/A 68°
    Low 54° 50° N/A 58°

    Sunrise/Sunset

    • Sunrise: 6:44 AM
    • Sunset: 6:43 PM
    • Duration: 11:59 hr

    Moonrise/Moonset

    • Moonrise: 1:18 AM
    • Moonset: 3:54 PM
    • Duration: 14:36 hr
    Astronomy

    Grayslake Weather Report

    Chilly winds to howl across Great Lakes early this week

    September 25, 2016; 5:13 PM ET

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

    Sun. Air Quality

    Sun. Asthma Risk

    Sun. UV Index