• Clear 69°
    Hair Frizz Current Weather
    • Relative Humidity
      83%
    • Wind
      Speed
      4 mph
    • Dew
      Point
      64°
  • Today

    Sep 5

    Hi 93°

    Mostly sunny, hot and humid

    Advisory for hair frizz
    • Wind
      Gust
      8 mph
    • Precip
      3%
    • Hours of Precip
      0
    Day Details >
  • Tomorrow

    Sep 6

    Hi 92°

    Mostly sunny, hot and humid

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

    Sep 7

    Hi 91°

    Partly sunny, hot and humid

    Advisory for hair frizz
    • Wind
      Gust
      8 mph
    • Precip
      7%
    • Hours of Precip
      0
    Day Details >
Next

A thunderstorm Wednesday afternoon

9/5 9/6 Now: 7:10am
AM 7-11
  • 7am Fog 70° 0%
  • 8am Mostly sunny 72° 0%
  • 9am Mostly sunny 76° 0%
  • 10am Mostly sunny 80° 0%
  • 11am Mostly sunny 84° 0%
PM 6-11
  • 6pm Mostly sunny 91° 0%
  • 7pm Mostly sunny 90° 0%
  • 8pm Partly sunny 87° 0%
  • 9pm Intermittent clouds 84° 0%
  • 10pm Intermittent clouds 83° 0%
  • 11pm Intermittent clouds 81° 0%
AM 12-5
  • 12am Mostly clear 79° 0%
  • 1am Clear 78° 0%
  • 2am Clear 76° 1%
  • 3am Clear 75° 1%
  • 4am Clear 74° 1%
  • 5am Clear 73° 1%
Hourly Forecast >
Sep 05, 2015; 4:57 AM ET
Five-day Weather Forecast for Louisville, KY
Louisville, KY 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.

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