• Mon

    May 18

    71°Lo 54°

    A little afternoon rain

    Outdoor Barbecue Weather
    • Precip
      55%
    • Hi
      RealFeel
      78°
    • Wind
      Gust
      15 mph
    more
  • Tue

    May 19

    71°Lo 56°

    A little afternoon rain

    Outdoor Barbecue Weather
    • Precip
      55%
    • Hi
      RealFeel
      75°
    • Wind
      Gust
      17 mph
    more
  • Wed

    May 20

    72°Lo 56°

    Periods of rain

    Outdoor Barbecue Weather
    • Precip
      72%
    • Hi
      RealFeel
      81°
    • Wind
      Gust
      8 mph
    more
  • Thu

    May 21

    71°Lo 57°

    Spotty morning showers

    Outdoor Barbecue Weather
    • Precip
      60%
    • Hi
      RealFeel
      77°
    • Wind
      Gust
      9 mph
  • Fri

    May 22

    74°Lo 56°

    Cloudy with a little rain

    Outdoor Barbecue Weather
    • Precip
      57%
    • Hi
      RealFeel
      76°
    • Wind
      Gust
      10 mph
    more
Next Previous
Hi 71° RealFeel® 77° Precipitation 60%

Day

N

E

S

W

  • ESE 5 mph
  • Gusts: 9 mph

A couple of showers in the morning; otherwise, times of clouds and sun

  • Max UV Index: 6 (High)
  • Thunderstorms: 20%
  • Precipitation: 0.07 in
  • Rain: 0.07 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1 hrs
  • Hours of Rain: 1 hrs
Lo 57° RealFeel® 57° Precipitation 25%

Night

N

E

S

W

  • SSE 4 mph
  • Gusts: 5 mph

Increasing cloudiness

  • 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 - May 21

more Historical Weather Data >
  Today Normal Record 5/21/2014
High 71° 69° N/A 84°
Low 57° 46° N/A 54°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:27 AM with 14:46 of sunlight, then sets at 8:13 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:45 AM with 14:41 of moolight, then sets at 11:26 PM

Crystal Lake Weather Report

Chicago: Weekend Warmth to Last Into Early Week

May 3, 2015; 1:27 AM ET

The month of May has opened the door for warm air to flow into the Chicago area following a cool end to April. 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.