• Today

    Dec 17

    29°Lo 20°

    Cloudy and colder

    Very Good for home energy
    • Avg
      RealFeel
      21°
    • Hi
      RealFeel
      22°
    • Wind
      Speed
      10 mph
    more
  • Thu

    Dec 18

    31°Lo 21°

    Mostly cloudy

    Good for home energy
    • Avg
      RealFeel
      26°
    • Hi
      RealFeel
      32°
    • Wind
      Speed
      4 mph
    more
  • Fri

    Dec 19

    34°Lo 24°

    Mostly cloudy

    Good for home energy
    • Avg
      RealFeel
      31°
    • Hi
      RealFeel
      37°
    • Wind
      Speed
      1 mph
    more
  • Sat

    Dec 20

    36°Lo 23°

    Clouds giving way to some sun

    Good for home energy
    • Avg
      RealFeel
      30°
    • Hi
      RealFeel
      38°
    • Wind
      Speed
      4 mph
    more
  • Sun

    Dec 21

    39°Lo 30°

    Partly sunny

    Good for home energy
    • Avg
      RealFeel
      26°
    • Hi
      RealFeel
      33°
    • Wind
      Speed
      8 mph
Next Previous
Partly sunny 39° Lo 33° RealFeel® 33° / 26°

N

E

S

W

  • Precipitation: 11%
  • Rain: 0 in
  • Snow: 0 in
  • Humidity: 69%
  • Cloud Cover: 45%
  • Dew Point: 27° F
  • Visibility: 10 mi
8 mph

Temperature History - Dec 21

more Historical Weather Data >
  Today Normal Record 12/21/2013
High 39° 34° 62° (1967) 33°
Low 30° 18° -18° (1963) 27°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:18 AM with 9:11 of sunlight, then sets at 4:29 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 6:33 AM with 10:03 of moolight, then sets at 4:36 PM

Ottawa Weather Report

Chicago: White Christmas in the Offing

December 17, 2014; 1:33 PM ET

While the next couple of days will be tranquil for the Chicago area, Christmas Eve could deliver enough snow to blanket the city. 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