• Today

    Aug 31

    84°Lo 55°

    Turning sunny and nice

    Watch for hair frizz
    • Wind
      Gust
      20 mph
    • Precip
      1%
    • Hours of Precip
      0
  • Tue

    Sep 1

    78°Lo 56°

    Areas of low clouds, then sun

    Advisory for hair frizz
    • Wind
      Gust
      21 mph
    • Precip
      2%
    • Hours of Precip
      0
    more
  • Wed

    Sep 2

    77°Lo 51°

    Areas of low clouds, then sun

    Advisory for hair frizz
    • Wind
      Gust
      23 mph
    • Precip
      3%
    • Hours of Precip
      0
    more
  • Thu

    Sep 3

    78°Lo 50°

    Areas of low clouds, then sun

    Watch for hair frizz
    • Wind
      Gust
      20 mph
    • Precip
      5%
    • Hours of Precip
      0
    more
  • Fri

    Sep 4

    81°Lo 50°

    Areas of low clouds, then sun

    Watch for hair frizz
    • Wind
      Gust
      18 mph
    • Precip
      1%
    • Hours of Precip
      0
    more
Next Previous
Hi 84° RealFeel® 83° Precipitation 1%

Day

N

E

S

W

  • SW 10 mph
  • Gusts: 20 mph

Nice with some clouds, then sunshine

  • 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 55° RealFeel® 54° Precipitation 2%

Night

N

E

S

W

  • WSW 7 mph
  • Gusts: 12 mph

Mainly clear early, then areas of low clouds forming

  • Max UV Index: N/A
  • Thunderstorms: 2%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Aug 31

more Historical Weather Data >
  Today Normal Record
High 84° N/A N/A N/A
Low 55° N/A N/A N/A

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:37 AM with 13:04 of sunlight, then sets at 7:41 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 9:04 PM with 12:59 of moolight, then sets at 10:03 AM

Napa Weather Report

San Francisco: Dry, Pleasant Conditions to Span Week

August 31, 2015; 3:10 AM ET

The San Francisco area will have dry and seasonable conditions throughout the week. 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.

Mon. Hair Frizz

Mon. Wind Maps

Mon. UV Index