• Today

    May 1

    81°Lo 51°

    Sunny and warmer

    Poor for skiing
    • Rain
      0 in
    • Precip
      7%
    • Hours of Precip
      0
    more
  • Mon

    May 2

    76°Lo 52°

    Low clouds, then sun

    Poor for skiing
    • Rain
      0 in
    • Precip
      7%
    • Hours of Precip
      0
  • Tue

    May 3

    71°Lo 51°

    Beautiful with periods of sun

    Poor for skiing
    • Rain
      0.01 in
    • Precip
      14%
    • Hours of Precip
      0.5
    more
  • Wed

    May 4

    65°Lo 52°

    Considerable cloudiness

    Poor for skiing
    • Rain
      0 in
    • Precip
      12%
    • Hours of Precip
      0
    more
  • Thu

    May 5

    64°Lo 50°

    An afternoon shower in spots

    Poor for skiing
    • Rain
      0.01 in
    • Precip
      46%
    • Hours of Precip
      0.5
    more
Next Previous
Hi 76° RealFeel® 82° Precipitation 7%

Day

N

E

S

W

  • W 7 mph
  • Gusts: 13 mph

Low clouds giving way to sunshine

  • Max UV Index: 8 (Very 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 52° RealFeel® 52° Precipitation 3%

Night

N

E

S

W

  • W 4 mph
  • Gusts: 9 mph

Mostly cloudy

  • 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 - May 2

more Historical Weather Data >
  Today Normal Record 5/2/2015
High 76° 69° N/A 72°
Low 52° 50° N/A 53°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:11 AM with 13:49 of sunlight, then sets at 8:00 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 3:37 AM with 11:51 of moolight, then sets at 3:28 PM

Castro Valley Weather Report

San Francisco: Rain showers may dampen the Bay Area for midweek

May 1, 2016; 12:07 PM ET

Dry conditions will dominate the region through early this week in the Bay Area before rain tries to return for the middle of the week. more >

Which Reigns Supreme: Skiing in the East or West?

Feb 15, 2012; 5:00 AM ET As the age-old debate rages on, Violeta Yas asks enthusiasts which they prefer, and why.

48 Hour Precipitation Forecast

Mon. Ski Weather