• Tonight

    Mar 26

    Lo 54°

    Clear

    Bicycling Weather
    • Precip
      2%
    • Hours of Precip
      0
    • Wind
      Gust
      13 mph
  • Fri

    Mar 27

    70°Lo 51°

    Plenty of sunshine

    Excellent for biking
    • Precip
      10%
    • Hours of Precip
      0
    • Wind
      Gust
      17 mph
    more
  • Sat

    Mar 28

    72°Lo 51°

    Partly sunny and pleasant

    Excellent for biking
    • Precip
      9%
    • Hours of Precip
      0
    • Wind
      Gust
      16 mph
    more
  • Sun

    Mar 29

    76°Lo 51°

    Partly sunny and pleasant

    Excellent for biking
    • Precip
      5%
    • Hours of Precip
      0
    • Wind
      Gust
      15 mph
    more
  • Mon

    Mar 30

    73°Lo 50°

    Sunny and pleasant

    Excellent for biking
    • Precip
      14%
    • Hours of Precip
      0
    • Wind
      Gust
      20 mph
    more
Next Previous
Hi 79° RealFeel® 82° Precipitation 2%

Day

N

E

S

W

  • WNW 6 mph
  • Gusts: 13 mph

Sunny and very warm

  • Max UV Index: 6 (High)
  • Thunderstorms: 0%
  • 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® 55° Precipitation 6%

Night

N

E

S

W

  • N 4 mph
  • Gusts: 10 mph

Clear

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

Temperature History - Mar 26

more Historical Weather Data >
  Today Normal Record 3/26/2014
High 79° N/A N/A 57°
Low 54° N/A N/A 49°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:03 AM with 12:23 of sunlight, then sets at 7:26 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 11:53 AM with 14:24 of moolight, then sets at 2:17 AM

Castro Valley Weather Report

San Francisco: Warmth to Hold into New Week

March 26, 2015; 11:35 PM ET

Warm weather and sunshine will continue to hold into the new week across the Bay Area. 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.