• Today

    Apr 16

    53°Lo 37°

    Becoming windier and warmer

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

    Apr 17

    56°Lo 34°

    A passing afternoon shower

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

    Apr 18

    50°Lo 30°

    Mostly cloudy with a shower

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

    Apr 19

    54°Lo 33°

    More clouds than sun

    Moderate indoor dust & dander levels
    • Precip
      7%
    • Wind
      Speed
      7 mph
    • Cloud
      Cover
      70%
    more
  • Sun

    Apr 20

    62°Lo 47°

    Mostly cloudy with a shower

    Moderate indoor dust & dander levels
    • Precip
      55%
    • Wind
      Speed
      10 mph
    • Cloud
      Cover
      93%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Fri
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  1am 2am 3am 4am 5am 6am 7am 8am
Forecast
Showers
Rain
Cloudy
Cloudy
Rain
Rain
Rain
Cloudy
Temp (°F) 39° 38° 38° 37° 35° 34° 35° 36°
RealFeel® 37° 35° 33° 32° 29° 27° 27° 30°
Humidity 77% 79% 81% 82% 83% 83% 82% 78%
   
  1am 2am 3am 4am 5am 6am 7am 8am
Rain
 
46%
 
51%
 
47%
 
49%
 
60%
 
60%
 
60%
 
40%
Snow
 
0%
 
3%
 
3%
 
3%
 
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2%
 
0%
Ice
 
0%
 
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  1am 2am 3am 4am 5am 6am 7am 8am
Wind (mph) 4 N 5 NNE 5 NNE 6 NNE 6 NNE 7 N 7 N 8 N
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 90% 92% 96% 100% 100% 100% 99% 94%
Dew Point 33° 32° 32° 32° 30° 29° 30° 30°
Middle Grid line 40 F Middle Grid line 35 F Middle Grid line 30 F

Temperature History - Apr 18

more Historical Weather Data >
  Today Normal Record 4/18/2013
High 50° 58° N/A 61°
Low 30° 36° N/A 36°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:08 AM with 13:30 of sunlight, then sets at 7:38 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 11:26 PM with 9:56 of moolight, then sets at 9:22 AM

Top Story

Crystal Lake Weather Report

Chicago: Chilly Weather to Return for the Weekend

April 16, 2014; 4:33 AM ET

While the city will warm up at midweek, by the weekend chilly weather will return and persist until next week. more >

Is it a Cold or the Flu?

Apr 7, 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?

Fri. Dust & Dander

Fri. Wind Maps