• Clear 69°
    Hair Frizz Current Weather
    • Relative Humidity
      100%
    • Wind
      Speed
      0 mph
    • Dew
      Point
      69°
  • Today

    Sep 5

    Hi 94°

    Mostly sunny, hot and humid

    Advisory for hair frizz
    • Wind
      Gust
      7 mph
    • Precip
      5%
    • Hours of Precip
      0
    Day Details >
  • Tomorrow

    Sep 6

    Hi 95°

    Mostly sunny, hot and humid

    Watch for hair frizz
    • Wind
      Gust
      9 mph
    • Precip
      3%
    • Hours of Precip
      0
    Day Details >
  • Monday

    Sep 7

    Hi 94°

    A thunderstorm in spots

    Advisory for hair frizz
    • Wind
      Gust
      8 mph
    • Precip
      40%
    • Hours of Precip
      1
    Day Details >
Next

The heat wave will continue through Monday

9/5 9/6 Now: 5:19am
AM 5-9
  • 5am Clear 72° 0%
  • 6am Mostly clear 70° 0%
  • 7am Mostly sunny 71° 0%
  • 8am Sunny 75° 0%
  • 9am Sunny 79° 0%
PM 4-9
  • 4pm Mostly sunny 94° 0%
  • 5pm Mostly sunny 93° 0%
  • 6pm Mostly sunny 90° 0%
  • 7pm Mostly sunny 86° 0%
  • 8pm Clear 83° 0%
  • 9pm Mostly clear 81° 0%
PM 10-3
  • 10pm Mostly clear 80° 0%
  • 11pm Mostly clear 78° 0%
  • 12am Clear 76° 0%
  • 1am Clear 75° 0%
  • 2am Mostly clear 74° 0%
  • 3am Mostly clear 73° 0%
Hourly Forecast >
Sep 05, 2015; 5:07 AM ET
Five-day Weather Forecast for St. Louis, MO
St. Louis, MO 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

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