• Today

    Aug 27

    79°Lo 59°

    Mostly sunny

    Excellent for biking
    • Precip
      1%
    • Hours of Precip
      0
    • Wind
      Gust
      13 mph
    more
  • Thu

    Aug 28

    78°Lo 61°

    Mostly sunny

    Excellent for biking
    • Precip
      0%
    • Hours of Precip
      0
    • Wind
      Gust
      14 mph
    more
  • Fri

    Aug 29

    76°Lo 62°

    Partly sunny

    Excellent for biking
    • Precip
      1%
    • Hours of Precip
      0
    • Wind
      Gust
      15 mph
  • Sat

    Aug 30

    78°Lo 59°

    Low clouds break for some sun

    Excellent for biking
    • Precip
      0%
    • Hours of Precip
      0
    • Wind
      Gust
      16 mph
    more
  • Sun

    Aug 31

    76°Lo 59°

    Partly sunny

    Excellent for biking
    • Precip
      1%
    • Hours of Precip
      0
    • Wind
      Gust
      16 mph
    more
Next Previous
Clouds and sun 70° Lo 63° RealFeel® 73° / 61°

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E

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W

  • Precipitation: 0%
  • Rain: 0 in
  • Snow: 0 in
  • Humidity: 74%
  • Cloud Cover: 90%
  • Dew Point: 58° F
  • Visibility: 10 mi
6 mph

Temperature History - Aug 29

more Historical Weather Data >
  Today Normal Record 8/29/2013
High 76° N/A N/A 77°
Low 62° N/A N/A 60°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:36 AM with 13:06 of sunlight, then sets at 7:42 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 10:25 AM with 11:23 of moolight, then sets at 9:48 PM

Top Story

Castro Valley Weather Report

PHOTOS: Magnitude 6.0 Earthquake Strikes Near San Francisco

August 27, 2014; 12:39 AM ET

More than 200 people were injured, including three critically, after a 6.0-magnitude earthquake rocked the San Francisco Bay area on Sunday morning. more >

Is Your Outdoor Gear Waterproof?

Dec 5, 2012; 5:00 AM ET Now that it's cold enough to hit the slopes, you may want to look more closely at what materials your winter sports gear is made of. As it turns out, not all waterproofing is created equal.