• Tonight

    Sep 4

    Lo 66°

    Partly cloudy, warm and humid

    Lawn Mowing Weather
    • Hours of Precip
      0
    • Precip
      25%
    • Hi
      RealFeel
      91°
    more
  • Sat

    Sep 5

    89°Lo 70°

    Partly sunny, warm and humid

    Very Good for lawn mowing
    • Hours of Precip
      0
    • Precip
      24%
    • Hi
      RealFeel
      98°
    more
  • Sun

    Sep 6

    90°Lo 71°

    Partly sunny, hot and humid

    Very Good for lawn mowing
    • Hours of Precip
      1
    • Precip
      9%
    • Hi
      RealFeel
      96°
    more
  • Mon

    Sep 7

    84°Lo 68°

    Mostly cloudy with a t-storm

    Fair for lawn mowing
    • Hours of Precip
      3.5
    • Precip
      55%
    • Hi
      RealFeel
      88°
  • Tue

    Sep 8

    77°Lo 62°

    Mostly cloudy with t-storms

    Poor for lawn mowing
    • Hours of Precip
      4
    • Precip
      66%
    • Hi
      RealFeel
      81°
    more
Next Previous
Hi 84° RealFeel® 88° Precipitation 55%

Day

N

E

S

W

  • SW 6 mph
  • Gusts: 10 mph

Rather cloudy and humid with a shower or thunderstorm around

  • Max UV Index: 3 (Moderate)
  • Thunderstorms: 40%
  • Precipitation: 0.1 in
  • Rain: 0.1 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1 hrs
  • Hours of Rain: 1 hrs
Lo 68° RealFeel® 69° Precipitation 66%

Night

N

E

S

W

  • S 5 mph
  • Gusts: 8 mph

Humid; an evening shower in spots followed by a couple of thunderstorms around late

  • Max UV Index: N/A
  • Thunderstorms: 60%
  • Precipitation: 0.37 in
  • Rain: 0.37 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 2.5 hrs
  • Hours of Rain: 2.5 hrs

Temperature History - Sep 7

more Historical Weather Data >
  Today Normal Record 9/7/2014
High 84° 76° N/A 75°
Low 68° 58° N/A 51°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:23 AM with 12:53 of sunlight, then sets at 7:16 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:08 AM with 14:45 of moolight, then sets at 3:53 PM

Grayslake Weather Report

Chicago: Sun, Humidity to Grip Region Before Stormy Labor Day

September 4, 2015; 4:04 PM ET

As the Labor Day weekend shapes up, Chicago residents will see mostly sunny and humid conditions until the holiday itself on Monday. more >

Why Do Leaves Change Color?

Sep 20, 2011; 5:00 AM ET Why do leaves change from green to beautiful shades of red, orange and yellow in the fall?

Mon. Degree Days

Mon. Evapotranspiration