• Early AM

    Aug 1

    Lo 62°

    Partly cloudy

    Stargazing Weather
    • Cloud
      Cover
      39%
    • Precip
      0%
    • Hours of Precip
      0
    more
  • Today

    Aug 1

    84°Lo 60°

    Mostly sunny

    Very Good for stargazing
    • Cloud
      Cover
      21%
    • Precip
      0%
    • Hours of Precip
      0
  • Sat

    Aug 2

    82°Lo 60°

    Mostly sunny

    Excellent for stargazing
    • Cloud
      Cover
      8%
    • Precip
      0%
    • Hours of Precip
      0
    more
  • Sun

    Aug 3

    78°Lo 61°

    Mostly sunny

    Excellent for stargazing
    • Cloud
      Cover
      16%
    • Precip
      0%
    • Hours of Precip
      0
    more
  • Mon

    Aug 4

    78°Lo 60°

    Mostly sunny

    Excellent for stargazing
    • Cloud
      Cover
      20%
    • Precip
      1%
    • Hours of Precip
      0
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Fri
5pm
6pm 7pm 8pm 9pm 10pm 11pm Sat
12am
  5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
Forecast
Sunny
Sunny
Sunny
Mostly Sunny
Mostly Clear
Mostly Clear
Mostly Clear
Mostly Clear
Temp (°F) 80° 78° 75° 71° 68° 66° 64° 65°
RealFeel® 78° 75° 71° 67° 64° 62° 62° 63°
Humidity 42% 45% 51% 57% 64% 69% 74% 70%
   
  5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
Wind (mph) 9 W 8 W 7 W 6 W 6 W 5 W 4 W 4 W
UV Index 3 1 0 0 0 0 0 0
Cloud Cover 3% 0% 0% 11% 25% 25% 25% 25%
Dew Point 55° 55° 56° 55° 55° 56° 55° 55°
Middle Grid line 85 F Middle Grid line 80 F Middle Grid line 75 F Middle Grid line 70 F Middle Grid line 65 F Middle Grid line 60 F

Temperature History - Aug 1

more Historical Weather Data >
  Today Normal Record 8/1/2013
High 84° N/A N/A 70°
Low 60° N/A N/A 54°

Solunar Information for Castro Valley, CA

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:12 AM with 14:05 of sunlight, then sets at 8:17 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 11:34 AM with 11:37 of moolight, then sets at 11:11 PM

Mon, Aug 4
First
Sun, Aug 10
Full
Sun, Aug 17
Last
Mon, Aug 25
New
Top Story

Castro Valley Weather Report

VIDEO: California Wildfires Persist in Sierra Nevada Foothills, Yosemite National Park

August 1, 2014; 4:58 AM ET

A wildfire that has already destroyed more than 60 structures is threatening more in the Sierra Nevada foothills near Plymouth, California, according to state fire officials. 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