• Tonight

    Oct 19

    Lo 45°

    Mostly cloudy and breezy

    Home Energy Efficiency Weather
    • Avg
      RealFeel
      42°
    • Hi
      RealFeel
      49°
    • Wind
      Speed
      12 mph
  • Mon

    Oct 20

    60°Lo 40°

    Variable cloudiness

    Poor for home energy
    • Avg
      RealFeel
      43°
    • Hi
      RealFeel
      57°
    • Wind
      Speed
      10 mph
    more
  • Tue

    Oct 21

    54°Lo 37°

    Times of clouds and sun

    Fair for home energy
    • Avg
      RealFeel
      44°
    • Hi
      RealFeel
      51°
    • Wind
      Speed
      9 mph
    more
  • Wed

    Oct 22

    56°Lo 35°

    Sunny and seasonably cool

    Poor for home energy
    • Avg
      RealFeel
      45°
    • Hi
      RealFeel
      57°
    • Wind
      Speed
      5 mph
    more
  • Thu

    Oct 23

    59°Lo 43°

    Sunny to partly cloudy

    Poor for home energy
    • Avg
      RealFeel
      50°
    • Hi
      RealFeel
      58°
    • Wind
      Speed
      7 mph
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sun
11pm
Mon
12am
1am 2am 3am 4am 5am 6am
  11pm 12am 1am 2am 3am 4am 5am 6am
Forecast
Mostly Cloudy
Mostly Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Temp (°F) 49° 49° 48° 48° 47° 47° 46° 45°
RealFeel® 40° 39° 38° 39° 38° 38° 36° 35°
Humidity 80% 81% 82% 83% 84% 86% 88% 90%
   
  11pm 12am 1am 2am 3am 4am 5am 6am
Rain
 
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Snow
 
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Ice
 
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  11pm 12am 1am 2am 3am 4am 5am 6am
Wind (mph) 13 SSW 15 SSW 16 SSW 13 SSW 14 SSW 13 SW 13 SW 13 WSW
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 81% 88% 91% 94% 96% 95% 94% 94%
Dew Point 43° 43° 43° 43° 43° 43° 42° 42°
Middle Grid line 50 F Middle Grid line 45 F Middle Grid line 40 F

Temperature History - Oct 19

more Historical Weather Data >
  Today Normal Record 10/19/2013
High 55° 59° N/A 53°
Low 45° 37° N/A 32°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:10 AM with 10:55 of sunlight, then sets at 6:05 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 2:59 AM with 13:01 of moolight, then sets at 4:00 PM

Crystal Lake Weather Report

Cool Weather Ahead for Chicago

October 19, 2014; 9:46 AM ET

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

Energy Efficient Lightbulbs and S.A.D

Sep 8, 2012; 5:00 AM ET With shorter days and colder nights in the fall and winter, some people develop seasonal affective disorder. When shopping for lightbulbs to treat the 'winter blues,'consider energy-efficient bulbs.

Sun. Home Energy Efficiency

Sun. Degree Days

Sun. UV Index