• Tonight

    Sep 20

    Lo 57°

    A thunderstorm in spots

    Home Energy Efficiency Weather
    • Avg
      RealFeel
      63°
    • Hi
      RealFeel
      75°
    • Wind
      Speed
      12 mph
  • Sun

    Sep 21

    65°Lo 43°

    Cooler; a shower in the a.m.

    Poor for home energy
    • Avg
      RealFeel
      52°
    • Hi
      RealFeel
      62°
    • Wind
      Speed
      13 mph
    more
  • Mon

    Sep 22

    66°Lo 47°

    Sunny to partly cloudy

    Poor for home energy
    • Avg
      RealFeel
      58°
    • Hi
      RealFeel
      70°
    • Wind
      Speed
      4 mph
    more
  • Tue

    Sep 23

    71°Lo 49°

    Mostly sunny and pleasant

    Poor for home energy
    • Avg
      RealFeel
      61°
    • Hi
      RealFeel
      75°
    • Wind
      Speed
      4 mph
    more
  • Wed

    Sep 24

    73°Lo 50°

    Sunny and pleasant

    Poor for home energy
    • Avg
      RealFeel
      61°
    • Hi
      RealFeel
      74°
    • Wind
      Speed
      6 mph
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sat
6am
7am 8am 9am 10am 11am 12pm 1pm
  6am 7am 8am 9am 10am 11am 12pm 1pm
Forecast
Cloudy
Showers
Mostly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
T-storms
Temp (°F) 59° 60° 63° 65° 69° 70° 72° 74°
RealFeel® 52° 52° 57° 61° 66° 70° 72° 74°
Humidity 85% 86% 81% 79% 76% 88% 82% 77%
   
  6am 7am 8am 9am 10am 11am 12pm 1pm
Rain
 
47%
 
51%
 
17%
 
17%
 
22%
 
43%
 
47%
 
51%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  6am 7am 8am 9am 10am 11am 12pm 1pm
Wind (mph) 12 SW 12 SW 12 SSW 13 SW 13 SW 13 SW 14 SW 13 SW
UV Index 0 0 0 1 2 3 4 4
Cloud Cover 92% 92% 82% 68% 57% 53% 71% 83%
Dew Point 54° 55° 57° 59° 61° 66° 66° 67°
Middle Grid line 75 F Middle Grid line 70 F Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F

Temperature History - Sep 20

more Historical Weather Data >
  Today Normal Record 9/20/2013
High 74° 71° N/A 73°
Low 57° 47° N/A 53°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:38 AM with 12:16 of sunlight, then sets at 6:54 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 3:15 AM with 13:45 of moolight, then sets at 5:00 PM

Top Story

Crystal Lake Weather Report

Chicago: Thunderstorms to Precede More Cool Air

September 20, 2014; 4:28 AM ET

Chicago is facing the threat of some disruptive thunderstorms on Saturday. 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.

Sat. Home Energy Efficiency

Sat. Degree Days

Sat. UV Index