• Tonight

    Dec 25

    Lo 39°

    Clear and chilly

    Stargazing Weather
    • Cloud
      Cover
      0%
    • Precip
      1%
    • Hours of Precip
      0
  • Fri

    Dec 26

    57°Lo 37°

    A full day of sunshine

    Very Good for stargazing
    • Cloud
      Cover
      11%
    • Precip
      1%
    • Hours of Precip
      0
    more
  • Sat

    Dec 27

    56°Lo 39°

    Mostly sunny

    Fair for stargazing
    • Cloud
      Cover
      63%
    • Precip
      3%
    • Hours of Precip
      0
    more
  • Sun

    Dec 28

    56°Lo 39°

    Times of clouds and sun

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

    Dec 29

    53°Lo 38°

    Partly sunny

    Very Good for stargazing
    • Cloud
      Cover
      0%
    • Precip
      6%
    • Hours of Precip
      0
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Thu
7am
8am 9am
  7am 8am 9am
Forecast
Clear
Sunny
Sunny
Temp (°F) 43° 44° 46°
RealFeel® 37° 37° 41°
Humidity 78% 77% 72%
   
  7am 8am 9am
Rain
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
   
  7am 8am 9am
Wind (mph) 8 NNW 9 NNW 9 NNW
UV Index 0 0 1
Cloud Cover 1% 1% 1%
Dew Point 36° 37° 37°
Middle Grid line 50 F Middle Grid line 45 F Middle Grid line 40 F

Temperature History - Dec 25

more Historical Weather Data >
  Today Normal Record 12/25/2013
High 56° N/A N/A 66°
Low 39° N/A N/A 47°

Solunar Information for Castro Valley, CA

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:22 AM with 9:33 of sunlight, then sets at 4:55 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 10:03 AM with 11:28 of moolight, then sets at 9:31 PM

Sun, Dec 28
First
Mon, Jan 5
Full
Tue, Jan 13
Last
Tue, Jan 20
New

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.

Thu. Stargazing