• Partly sunny 60°
    Hair Frizz Current Weather
    • Relative Humidity
      59%
    • Wind
      Speed
      17 mph
    • Dew
      Point
      46°
  • Today

    May 5

    Hi 65°

    Sun and some clouds

    Watch for hair frizz
    • Wind
      Gust
      18 mph
    • Precip
      2%
    • Hours of Precip
      0
    Day Details >
  • Tomorrow

    May 6

    Hi 67°

    Areas of low clouds, then sun

    Watch for hair frizz
    • Wind
      Gust
      24 mph
    • Precip
      11%
    • Hours of Precip
      0
    Day Details >
  • Thursday

    May 7

    Hi 68°

    Times of clouds and sun

    Watch for hair frizz
    • Wind
      Gust
      23 mph
    • Precip
      17%
    • Hours of Precip
      0
    Day Details >
Next

Breezy tomorrow afternoon

5/5 5/6 Now: 1:41pm
PM 1-5
  • 1pm Partly sunny 60° 0%
  • 2pm Sunny 62° 0%
  • 3pm Sunny 65° 0%
  • 4pm Mostly sunny 64° 0%
  • 5pm Partly sunny 63° 0%
AM 12-5
  • 12am Partly cloudy 53° 0%
  • 1am Partly cloudy 53° 0%
  • 2am Partly cloudy 52° 0%
  • 3am Partly cloudy 51° 0%
  • 4am Partly cloudy 51° 0%
  • 5am Partly cloudy 49° 0%
AM 6-11
  • 6am Partly cloudy 50° 0%
  • 7am Partly sunny 51° 0%
  • 8am Mostly cloudy 53° 0%
  • 9am Mostly cloudy 55° 0%
  • 10am Mostly cloudy 56° 0%
  • 11am Mostly cloudy 58° 0%
Hourly Forecast >
May 05, 2015; 4:10 PM ET
Five-day Weather Forecast for San Francisco, CA
San Francisco, CA 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.

Tue. Hair Frizz

Tue. Wind Maps

Tue. UV Index