• Today

    May 27

    65°Lo 53°

    Low clouds, then some sun

    Excellent for driving
    • Precip
      2%
    • Hours of Precip
      0
    • Rain
      0 in
    more
  • Thu

    May 28

    67°Lo 53°

    Low clouds, then some sun

    Excellent for driving
    • Precip
      2%
    • Hours of Precip
      0
    • Rain
      0 in
    more
  • Fri

    May 29

    69°Lo 55°

    Clearing and pleasant

    Excellent for driving
    • Precip
      1%
    • Hours of Precip
      0
    • Rain
      0 in
    more
  • Sat

    May 30

    70°Lo 54°

    Areas of low clouds, then sun

    Excellent for driving
    • Precip
      1%
    • Hours of Precip
      0
    • Rain
      0 in
  • Sun

    May 31

    68°Lo 56°

    Low clouds, then some sun

    Excellent for driving
    • Precip
      10%
    • Hours of Precip
      0.5
    • Rain
      0.01 in
    more
Next Previous
Hi 70° RealFeel® 75° Precipitation 1%

Day

N

E

S

W

  • WSW 8 mph
  • Gusts: 13 mph

Pleasant with areas of low clouds early; otherwise, mostly sunny

  • Max UV Index: 8 (Very 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 54° RealFeel® 51° Precipitation 2%

Night

N

E

S

W

  • WSW 7 mph
  • Gusts: 10 mph

Partly cloudy

  • 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 - May 30

more Historical Weather Data >
  Today Normal Record 5/30/2014
High 70° N/A N/A 62°
Low 54° N/A N/A 49°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:49 AM with 14:34 of sunlight, then sets at 8:23 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 5:38 PM with 11:01 of moolight, then sets at 4:39 AM

Castro Valley Weather Report

San Francisco: Seasonable, Dry Weather to Remain Through Late Week

May 27, 2015; 10:33 AM ET

Dry and seasonable weather is forecast for San Francisco this week. more >

Travel Weather Forecast

May 27, 2015; 8:28 AM ET United States travel weather forecast

Sat. Driving Weather