• Early AM

    Oct 20

    Lo 45°

    Mostly cloudy

    Bicycling Weather
    • Precip
      8%
    • Hours of Precip
      0
    • Wind
      Gust
      21 mph
    more
  • Today

    Oct 20

    61°Lo 39°

    Increasing clouds

    Very Good for biking
    • Precip
      5%
    • Hours of Precip
      0
    • Wind
      Gust
      17 mph
    more
  • Tue

    Oct 21

    54°Lo 35°

    Cool with clouds and sun

    Very Good for biking
    • Precip
      1%
    • Hours of Precip
      0
    • Wind
      Gust
      17 mph
  • Wed

    Oct 22

    57°Lo 36°

    Plenty of sunshine

    Very Good for biking
    • Precip
      0%
    • Hours of Precip
      0
    • Wind
      Gust
      8 mph
    more
  • Thu

    Oct 23

    59°Lo 45°

    Sunny to partly cloudy

    Very Good for biking
    • Precip
      25%
    • Hours of Precip
      0
    • Wind
      Gust
      13 mph
    more
Next Previous
Hi 54° RealFeel® 50° Precipitation 1%

Day

N

E

S

W

  • N 10 mph
  • Gusts: 17 mph

Cool with times of clouds and sun

  • Max UV Index: 3 (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
Lo 35° RealFeel® 35° Precipitation 0%

Night

N

E

S

W

  • NE 5 mph
  • Gusts: 10 mph

Partly cloudy and chilly

  • 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 - Oct 21

more Historical Weather Data >
  Today Normal Record 10/21/2013
High 54° 58° N/A 48°
Low 35° 36° N/A 26°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:13 AM with 10:49 of sunlight, then sets at 6:02 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 4:55 AM with 12:02 of moolight, then sets at 4:57 PM

Crystal Lake Weather Report

Cool Weather Ahead for Chicago

October 20, 2014; 2:26 AM ET

Seasonable temperatures will be the rule this week across Chicagoland. more >

Is Your Outdoor Gear Waterproof?

Dec 5, 2012; 5:00 AM ET Now that it's cold enough to hit the slopes, you may want to look more closely at what materials your winter sports gear is made of. As it turns out, not all waterproofing is created equal.