• Today

    Sep 2

    81°Lo 58°

    Times of clouds and sun

    Poor for home energy
    • Avg
      RealFeel
      70°
    • Hi
      RealFeel
      83°
    • Wind
      Speed
      5 mph
  • Wed

    Sep 3

    83°Lo 69°

    Partly sunny

    Poor for home energy
    • Avg
      RealFeel
      76°
    • Hi
      RealFeel
      86°
    • Wind
      Speed
      7 mph
    more
  • Thu

    Sep 4

    89°Lo 70°

    Mostly cloudy, warm and humid

    Poor for home energy
    • Avg
      RealFeel
      83°
    • Hi
      RealFeel
      96°
    • Wind
      Speed
      12 mph
    more
  • Fri

    Sep 5

    76°Lo 55°

    Not as warm with t-storms

    Poor for home energy
    • Avg
      RealFeel
      64°
    • Hi
      RealFeel
      76°
    • Wind
      Speed
      8 mph
    more
  • Sat

    Sep 6

    72°Lo 51°

    Mostly sunny and nice

    Poor for home energy
    • Avg
      RealFeel
      63°
    • Hi
      RealFeel
      75°
    • Wind
      Speed
      6 mph
    more
Next Previous
Hi 81° RealFeel® 83° Precipitation 35%

Day

N

E

S

W

  • WSW 5 mph
  • Gusts: 11 mph

Times of clouds and sun

  • Max UV Index: 6 (High)
  • Thunderstorms: 40%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 58° RealFeel® 57° Precipitation 2%

Night

N

E

S

W

  • N 2 mph
  • Gusts: 5 mph

Clear

  • Max UV Index: N/A
  • Thunderstorms: 40%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Sep 2

more Historical Weather Data >
  Today Normal Record 9/2/2013
High 81° 78° N/A 72°
Low 58° 55° N/A 49°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:19 AM with 13:07 of sunlight, then sets at 7:26 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 2:11 PM with 9:59 of moolight, then sets at 12:10 AM

Top Story

Crystal Lake Weather Report

Chicago: Cooler, Less Humid Air to Return by Late Week

September 2, 2014; 2:42 PM ET

While Labor Day marks an unofficial end to the summer, the Chicago area will see warm, humid conditions continue before temperatures slide late in the week. more >

Energy Efficient Lightbulbs and S.A.D

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Tue. Home Energy Efficiency

Tue. Degree Days

Tue. UV Index