• Tonight

    Sep 1

    Lo 56°

    Increasing cloudiness

    Hair Frizz Weather
    • Wind
      Gust
      23 mph
    • Precip
      1%
    • Hours of Precip
      0
  • Wed

    Sep 2

    78°Lo 52°

    Areas of low clouds, then sun

    Watch for hair frizz
    • Wind
      Gust
      24 mph
    • Precip
      1%
    • Hours of Precip
      0
    more
  • Thu

    Sep 3

    77°Lo 50°

    Areas of low clouds, then sun

    Watch for hair frizz
    • Wind
      Gust
      21 mph
    • Precip
      8%
    • Hours of Precip
      0
    more
  • Fri

    Sep 4

    76°Lo 50°

    Areas of low clouds, then sun

    Watch for hair frizz
    • Wind
      Gust
      24 mph
    • Precip
      3%
    • Hours of Precip
      0
    more
  • Sat

    Sep 5

    80°Lo 51°

    Clouds breaking for sun

    Unlikely for hair frizz
    • Wind
      Gust
      17 mph
    • Precip
      1%
    • Hours of Precip
      0
    more
Next Previous
Hi 74° RealFeel® 75° Precipitation 1%

Day

N

E

S

W

  • SSW 13 mph
  • Gusts: 23 mph

After a cloudy start, sunshine returns; a refreshing breeze this afternoon

  • Max UV Index: 6 (High)
  • Thunderstorms: 1%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 56° RealFeel® 53° Precipitation 1%

Night

N

E

S

W

  • WSW 10 mph
  • Gusts: 17 mph

Increasing cloudiness

  • Max UV Index: N/A
  • Thunderstorms: 1%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Sep 1

more Historical Weather Data >
  Today Normal Record 9/1/2014
High 74° 84° 107° (1955) 91°
Low 56° 54° 44° (1957) 52°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:39 AM with 13:00 of sunlight, then sets at 7:39 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 9:44 PM with 13:29 of moolight, then sets at 11:13 AM

Napa Weather Report

San Francisco: Sunny Skies, Pleasant Conditions to Last Into Labor Day Weekend

September 1, 2015; 8:57 PM ET

Sunny skies and seasonable conditions will follow low clouds each day through Saturday in the Bay Area. more >

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