• Early AM

    Feb 9

    Lo 49°

    Clear

    Stargazing Weather
    • Cloud
      Cover
      0%
    • Precip
      1%
    • Hours of Precip
      0
    more
  • Today

    Feb 9

    71°Lo 48°

    Plenty of sunshine

    Very Good for stargazing
    • Cloud
      Cover
      26%
    • Precip
      4%
    • Hours of Precip
      0
    more
  • Wed

    Feb 10

    69°Lo 47°

    Partly sunny

    Fair for stargazing
    • Cloud
      Cover
      69%
    • Precip
      3%
    • Hours of Precip
      0
    more
  • Thu

    Feb 11

    69°Lo 48°

    Periods of clouds and sun

    Good for stargazing
    • Cloud
      Cover
      61%
    • Precip
      4%
    • Hours of Precip
      0
    more
  • Fri

    Feb 12

    67°Lo 47°

    Intervals of clouds and sun

    Poor for stargazing
    • Cloud
      Cover
      79%
    • Precip
      5%
    • Hours of Precip
      0
Next Previous
Hi 67° RealFeel® 70° Precipitation 7%

Day

N

E

S

W

  • NW 4 mph
  • Gusts: 7 mph

Intervals of clouds and sun

  • Max UV Index: 3 (Moderate)
  • Thunderstorms: 1%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 47° RealFeel® 48° Precipitation 5%

Night

N

E

S

W

  • SW 4 mph
  • Gusts: 6 mph

Mostly cloudy

  • Max UV Index: N/A
  • Thunderstorms: 1%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Feb 12

more Historical Weather Data >
  Today Normal Record 2/12/2015
High 67° 61° N/A 73°
Low 47° 45° N/A 49°

Solunar Information for Castro Valley, CA

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:02 AM with 10:42 of sunlight, then sets at 5:44 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 9:39 AM with 13:06 of moolight, then sets at 10:45 PM

Mon, Feb 15
First
Mon, Feb 22
Full
Tue, Mar 1
Last
Wed, Mar 9
New

Castro Valley Weather Report

Warmth to challenge records from Seattle to Los Angeles early this week

February 9, 2016; 2:14 AM ET

Warmer air will build from California to Washington into Tuesday raising temperatures to near-record levels and increasing the risk of wildfires in some areas. 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.

Fri. Stargazing