• Early AM

    May 5

    Lo 49°

    Cloudy

    Stargazing Weather
    • Cloud
      Cover
      93%
    • Precip
      0%
    • Hours of Precip
      0
    more
  • Today

    May 5

    64°Lo 49°

    Low clouds, then sunshine

    Fair for stargazing
    • Cloud
      Cover
      45%
    • Precip
      3%
    • Hours of Precip
      0
  • Wed

    May 6

    65°Lo 49°

    Mostly sunny and comfortable

    Good for stargazing
    • Cloud
      Cover
      45%
    • Precip
      25%
    • Hours of Precip
      0
    more
  • Thu

    May 7

    68°Lo 49°

    Times of clouds and sun

    Poor for stargazing
    • Cloud
      Cover
      18%
    • Precip
      10%
    • Hours of Precip
      0
    more
  • Fri

    May 8

    70°Lo 50°

    Sunny

    Poor for stargazing
    • Cloud
      Cover
      20%
    • Precip
      3%
    • Hours of Precip
      0
    more
Next Previous
Hi 64° RealFeel® 67° Precipitation 2%

Day

N

E

S

W

  • W 10 mph
  • Gusts: 18 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 49° RealFeel® 45° Precipitation 3%

Night

N

E

S

W

  • WSW 8 mph
  • Gusts: 14 mph

Patchy clouds

  • 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 5

more Historical Weather Data >
  Today Normal Record 5/5/2014
High 64° N/A N/A 62°
Low 49° N/A N/A 53°

Solunar Information for Castro Valley, CA

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:08 AM with 13:54 of sunlight, then sets at 8:02 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 9:44 PM with 10:26 of moolight, then sets at 8:10 AM

Mon, May 11
Last
Mon, May 18
New
Mon, May 25
First
Tue, Jun 2
Full

Castro Valley Weather Report

San Francisco: Seasonable Temperatures to Continue Through Week

May 5, 2015; 2:42 AM ET

A pattern of seasonable temperatures will continue through the first part of the new week, with low clouds in the morning and sunny conditions through the afternoon. more >

Curiosity Tastes Mars

Dec 14, 2012; 5:00 AM ET The Mars Science Laboratory Rover 'Curiosity' continues its sampling and analyzing of the Martian surface.

Tue. Stargazing