• Today

    Aug 1

    76°Lo 62°

    Clouds giving way to some sun

    Poor for stargazing
    • Cloud
      Cover
      70%
    • Precip
      4%
    • Hours of Precip
      0
    more
  • Sun

    Aug 2

    74°Lo 61°

    Low clouds, then sunshine

    Fair for stargazing
    • Cloud
      Cover
      25%
    • Precip
      2%
    • Hours of Precip
      0
    more
  • Mon

    Aug 3

    73°Lo 61°

    Low clouds, then sun

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

    Aug 4

    73°Lo 58°

    Clouds breaking for sun

    Poor for stargazing
    • Cloud
      Cover
      66%
    • Precip
      2%
    • Hours of Precip
      0
    more
  • Wed

    Aug 5

    77°Lo 55°

    Low clouds, then some sun

    Good for stargazing
    • Cloud
      Cover
      8%
    • Precip
      1%
    • Hours of Precip
      0
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Mon
9am
10am 11am 12pm 1pm 2pm 3pm 4pm
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Forecast
Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Mostly Sunny
Mostly Sunny
Mostly Sunny
Temp (°F) 63° 64° 67° 69° 71° 72° 73° 72°
RealFeel® 62° 64° 67° 71° 73° 76° 75° 73°
Humidity 83% 77% 74% 70% 66% 62% 63% 65%
   
  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
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Ice
 
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  9am 10am 11am 12pm 1pm 2pm 3pm 4pm
Wind (mph) 9 WSW 9 WSW 9 WSW 10 W 13 W 14 W 15 W 15 W
UV Index 1 2 2 4 5 7 6 5
Cloud Cover 95% 95% 95% 95% 95% 25% 25% 25%
Dew Point 58° 57° 58° 59° 59° 59° 60° 60°
Middle Grid line 75 F Middle Grid line 70 F Middle Grid line 65 F Middle Grid line 60 F

Temperature History - Aug 3

more Historical Weather Data >
  Today Normal Record 8/3/2014
High 73° N/A N/A 67°
Low 61° N/A N/A 57°

Solunar Information for Castro Valley, CA

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:14 AM with 14:01 of sunlight, then sets at 8:15 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 10:28 PM with 12:42 of moolight, then sets at 11:10 AM

Fri, Aug 7
Last
Fri, Aug 14
New
Sat, Aug 22
First
Sat, Aug 29
Full

Castro Valley Weather Report

San Francisco: Dry Weather Continues in the Bay Area

August 1, 2015; 4:06 PM ET

The only fly in the ointment in the forecast will be low morning clouds which may cause travel delays at San Francisco International Airport. 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.

Mon. Stargazing