• Tonight

    Sep 21

    Lo 62°

    Partly cloudy

    Stargazing Weather
    • Cloud
      Cover
      39%
    • Precip
      0%
    • Hours of Precip
      0
  • Mon

    Sep 22

    75°Lo 60°

    Areas of low clouds, then sun

    Good for stargazing
    • Cloud
      Cover
      56%
    • Precip
      1%
    • Hours of Precip
      0
    more
  • Tue

    Sep 23

    77°Lo 64°

    Areas of low clouds, then sun

    Excellent for stargazing
    • Cloud
      Cover
      34%
    • Precip
      4%
    • Hours of Precip
      0
    more
  • Wed

    Sep 24

    78°Lo 64°

    Considerable cloudiness

    Poor for stargazing
    • Cloud
      Cover
      68%
    • Precip
      50%
    • Hours of Precip
      0.5
    more
  • Thu

    Sep 25

    72°Lo 59°

    Some sun with a few showers

    Fair for stargazing
    • Cloud
      Cover
      67%
    • Precip
      12%
    • Hours of Precip
      2
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sun
3pm
4pm 5pm 6pm 7pm 8pm 9pm 10pm
  3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm
Forecast
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Cloudy
Cloudy
Cloudy
Temp (°F) 72° 72° 71° 69° 67° 66° 65° 65°
RealFeel® 72° 70° 67° 64° 62° 61° 60° 61°
Humidity 70% 68% 70% 74% 78% 80% 82% 83%
   
  3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
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  3pm 4pm 5pm 6pm 7pm 8pm 9pm 10pm
Wind (mph) 9 W 10 W 11 W 12 W 12 WNW 10 WNW 8 W 8 W
UV Index 3 2 1 0 0 0 0 0
Cloud Cover 69% 70% 66% 71% 70% 69% 71% 57%
Dew Point 62° 62° 61° 60° 60° 60° 60° 60°
Middle Grid line 75 F Middle Grid line 70 F Middle Grid line 65 F Middle Grid line 60 F

Temperature History - Sep 21

more Historical Weather Data >
  Today Normal Record 9/21/2013
High 72° N/A N/A 66°
Low 62° N/A N/A 58°

Solunar Information for Castro Valley, CA

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:55 AM with 12:12 of sunlight, then sets at 7:07 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 4:36 AM with 13:08 of moolight, then sets at 5:44 PM

Wed, Sep 24
New
Wed, Oct 1
First
Wed, Oct 8
Full
Wed, Oct 15
Last

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.

Sun. Stargazing