• Today

    Jul 1

    87°Lo 61°

    A thunderstorm in spots

    Very Good for running
    • Precip
      40%
    • Hours of Precip
      1
    • Wind
      Gust
      16 mph
    more
  • Thu

    Jul 2

    80°Lo 61°

    A blend of sun and clouds

    Excellent for running
    • Precip
      25%
    • Hours of Precip
      0
    • Wind
      Gust
      18 mph
  • Fri

    Jul 3

    79°Lo 60°

    Pleasant with some sun

    Excellent for running
    • Precip
      1%
    • Hours of Precip
      0
    • Wind
      Gust
      17 mph
    more
  • Sat

    Jul 4

    77°Lo 59°

    Mostly sunny and nice

    Excellent for running
    • Precip
      0%
    • Hours of Precip
      0
    • Wind
      Gust
      17 mph
    more
  • Sun

    Jul 5

    76°Lo 58°

    Mostly sunny and beautiful

    Excellent for running
    • Precip
      1%
    • Hours of Precip
      0
    • Wind
      Gust
      21 mph
    more
Next Previous
Hi 80° RealFeel® 83° Precipitation 25%

Day

N

E

S

W

  • WNW 10 mph
  • Gusts: 18 mph

A blend of sun and clouds

  • Max UV Index: 8 (Very High)
  • Thunderstorms: 6%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 61° RealFeel® 61° Precipitation 8%

Night

N

E

S

W

  • NW 7 mph
  • Gusts: 16 mph

Partly cloudy

  • Max UV Index: N/A
  • Thunderstorms: 4%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Jul 2

more Historical Weather Data >
  Today Normal Record 7/2/2014
High 80° N/A N/A 73°
Low 61° N/A N/A 55°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:51 AM with 14:43 of sunlight, then sets at 8:34 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 9:03 PM with 10:41 of moolight, then sets at 7:44 AM

Castro Valley Weather Report

San Francisco: Warm, Dry Through the Independence Day Weekend

July 1, 2015; 12:20 PM ET

The San Francisco area will remain dry and warm into the Independence Day weekend. more >

Avoid the Winter Workout Blues

Dec 26, 2012; 5:00 AM ET When it's snowing or cold, most of us want nothing more than to keep warm on the couch. But Violeta Yas has some tips to help you sneak in mini workouts at the office, regardless of the weather.