• Cloudy 31°
    Hair Frizz Current Weather
    • Relative Humidity
      72%
    • Wind
      Speed
      6 mph
    • Dew
      Point
      23°
  • Tonight

    Dec 27

    Lo 24°

    Clouds breaking; colder

    Hair Frizz Weather
    • Wind
      Gust
      37 mph
    • Precip
      50%
    • Hours of Precip
      0.5
    Day Details >
  • Tomorrow

    Dec 28

    Hi 34°

    Partly sunny

    Watch for hair frizz
    • Wind
      Gust
      8 mph
    • Precip
      6%
    • Hours of Precip
      0
    Day Details >
  • Monday

    Dec 29

    Hi 29°

    Mostly cloudy

    Watch for hair frizz
    • Wind
      Gust
      13 mph
    • Precip
      25%
    • Hours of Precip
      0
    Day Details >
Next

Noticeably colder tomorrow

12/27 12/28 Now: 11:38pm
PM 11-3
  • 11pm Cloudy 30° 0%
  • 12am Mostly cloudy 30° 0%
  • 1am Partly cloudy 29° 0%
  • 2am Mostly clear 28° 0%
  • 3am Mostly clear 27° 0%
AM 10-3
  • 10am Mostly sunny 30° 0%
  • 11am Mostly sunny 31° 0%
  • 12pm Mostly sunny 32° 0%
  • 1pm Mostly sunny 33° 0%
  • 2pm Mostly sunny 34° 0%
  • 3pm Mostly sunny 33° 0%
PM 4-9
  • 4pm Mostly sunny 32° 0%
  • 5pm Mostly clear 31° 0%
  • 6pm Mostly clear 29° 0%
  • 7pm Mostly clear 28° 0%
  • 8pm Mostly clear 27° 0%
  • 9pm Mostly clear 27° 0%
Hourly Forecast >
Chicago, IL Weather Forecast

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The History Behind the UV Index

Nov 12, 2012; 5:00 AM ET The UV index has been around since the early 1990s. It was created to help you plan outdoor activities in hopes to limit overexposure to the sun. Jeannette Calle has more.

Sat. Hair Frizz

Sat. Wind Maps

Sat. UV Index