• Today

    Apr 19

    65°Lo 42°

    Sunny much of the time

    Moderate indoor dust & dander levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
    more
  • Sun

    Apr 20

    73°Lo 52°

    Partly sunny

    Low indoor dust & dander levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
    more
  • Mon

    Apr 21

    69°Lo 45°

    A couple of thunderstorms

    Low indoor dust & dander levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      0 - Low
    • Tree
      Pollen
      50 - Moderate
    more
  • Tue

    Apr 22

    56°Lo 34°

    Cooler; a morning shower

    Low indoor dust & dander levels
    • Precip
      40%
    • Wind
      Speed
      12 mph
    • Cloud
      Cover
      60%
    more
  • Wed

    Apr 23

    58°Lo 40°

    Partly sunny

    Moderate indoor dust & dander levels
    • Precip
      10%
    • Wind
      Speed
      8 mph
    • Cloud
      Cover
      33%
Next Previous
Hi 58° RealFeel® 62° Precipitation 10%

Day

N

E

S

W

  • ESE 8 mph
  • Gusts: 13 mph

Partly sunny

  • Max UV Index: 7 (High)
  • Thunderstorms: 3%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 40° RealFeel® 31° Precipitation 24%

Night

N

E

S

W

  • SSE 9 mph
  • Gusts: 14 mph

Mostly cloudy

  • Max UV Index: N/A
  • Thunderstorms: 4%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Apr 23

more Historical Weather Data >
  Today Normal Record 4/23/2013
High 58° 60° N/A 52°
Low 40° 37° N/A 36°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:00 AM with 13:44 of sunlight, then sets at 7:44 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 2:38 AM with 11:07 of moolight, then sets at 1:45 PM

Top Story

Crystal Lake Weather Report

Chicago: Weekend Warmth on the Way

April 19, 2014; 3:14 AM ET

Seasonal warmth looks to make a return to Chicago right in time for the holiday weekend. more >

Is it a Cold or the Flu?

Apr 19, 2014; 5:00 AM ET Symptoms caused by the common cold can often resemble those associated with the influenza virus, so how do you differentiate between the two?

Wed. Dust & Dander

Wed. Wind Maps