• Early AM

    Apr 21

    Lo 34°

    Clearing

    Home Energy Efficiency Weather
    • Avg
      RealFeel
      31°
    • Hi
      RealFeel
      39°
    • Wind
      Speed
      14 mph
    more
  • Today

    Apr 21

    50°Lo 29°

    Strong winds; mostly cloudy

    Fair for home energy
    • Avg
      RealFeel
      30°
    • Hi
      RealFeel
      42°
    • Wind
      Speed
      23 mph
  • Wed

    Apr 22

    49°Lo 27°

    Windy with variable clouds

    Fair for home energy
    • Avg
      RealFeel
      31°
    • Hi
      RealFeel
      42°
    • Wind
      Speed
      17 mph
    more
  • Thu

    Apr 23

    50°Lo 28°

    Sunny and breezy

    Fair for home energy
    • Avg
      RealFeel
      36°
    • Hi
      RealFeel
      49°
    • Wind
      Speed
      14 mph
    more
  • Fri

    Apr 24

    53°Lo 31°

    Cloudy and cool

    Fair for home energy
    • Avg
      RealFeel
      38°
    • Hi
      RealFeel
      53°
    • Wind
      Speed
      8 mph
    more
Next Previous
Hi 50° RealFeel® 42° Precipitation 25%

Day

N

E

S

W

  • W 23 mph
  • Gusts: 40 mph

Very windy; chilly with variable cloudiness

  • Max UV Index: 5 (Moderate)
  • Thunderstorms: 1%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 29° RealFeel® 17° Precipitation 24%

Night

N

E

S

W

  • W 14 mph
  • Gusts: 30 mph

Partly cloudy, breezy and chilly

  • Max UV Index: N/A
  • Thunderstorms: 1%
  • 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 21

more Historical Weather Data >
  Today Normal Record 4/21/2014
High 50° 58° N/A 72°
Low 29° 40° N/A 55°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:03 AM with 13:38 of sunlight, then sets at 7:41 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:19 AM with 14:45 of moolight, then sets at 11:04 PM

Island Lake Weather Report

Chicago: Temperatures to Plummet After Extended Warm Spell

April 21, 2015; 12:17 AM ET

After a two-week stretch of above-normal temperatures, Chicago is set to fall into a chilly pattern into late this week. 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.

Tue. Home Energy Efficiency

Tue. Degree Days

Tue. UV Index