• Some clouds 84°
    Hair Frizz Current Weather
    • Relative Humidity
      56%
    • Wind
      Speed
      4 mph
    • Dew
      Point
      67°
  • Tonight

    Aug 3

    Lo 71°

    A thunderstorm in spots

    Hair Frizz Weather
    • Wind
      Gust
      13 mph
    • Precip
      35%
    • Hours of Precip
      1
    Day Details >
  • Tomorrow

    Aug 4

    Hi 88°

    Periods of sun with a t-storm

    Advisory for hair frizz
    • Wind
      Gust
      8 mph
    • Precip
      56%
    • Hours of Precip
      3.5
    Day Details >
  • Wednesday

    Aug 5

    Hi 83°

    A shower and t-storm around

    Warning for hair frizz
    • Wind
      Gust
      10 mph
    • Precip
      66%
    • Hours of Precip
      8
    Day Details >
Next

Thunderstorms, some severe, tomorrow morning through late Wednesday night

8/3 8/4 Now: 9:04pm
PM 9-1
  • 9pm Partly cloudy w/ t-storms 80° 51%
  • 10pm Mostly clear 79° 47%
  • 11pm Partly cloudy 77° 10%
  • 12am Partly cloudy 76° 10%
  • 1am Partly cloudy 75° 14%
AM 8-1
  • 8am Intermittent clouds 73° 47%
  • 9am Mostly cloudy w/ t-storms 72° 51%
  • 10am Intermittent clouds 76° 47%
  • 11am Intermittent clouds 79° 34%
  • 12pm Intermittent clouds 81° 34%
  • 1pm Intermittent clouds 83° 34%
PM 2-7
  • 2pm Intermittent clouds 85° 34%
  • 3pm Intermittent clouds 86° 34%
  • 4pm Intermittent clouds 88° 37%
  • 5pm Intermittent clouds 86° 47%
  • 6pm Mostly cloudy w/ t-storms 83° 51%
  • 7pm Intermittent clouds 82° 47%
Hourly Forecast >
Aug 03, 2015; 3:48 PM 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.

Mon. Hair Frizz

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Mon. UV Index