• Early AM

    Apr 18

    Lo 53°

    Partly to mostly cloudy

    Stargazing Weather
    • Cloud
      Cover
      55%
    • Precip
      4%
    • Hours of Precip
      0
    more
  • Today

    Apr 18

    67°Lo 49°

    Partly sunny

    Fair for stargazing
    • Cloud
      Cover
      43%
    • Precip
      1%
    • Hours of Precip
      0
  • Sat

    Apr 19

    66°Lo 49°

    Mostly sunny

    Good for stargazing
    • Cloud
      Cover
      31%
    • Precip
      1%
    • Hours of Precip
      0
    more
  • Sun

    Apr 20

    72°Lo 51°

    Partly sunny

    Very Good for stargazing
    • Cloud
      Cover
      46%
    • Precip
      1%
    • Hours of Precip
      0
    more
  • Mon

    Apr 21

    65°Lo 51°

    Times of sun and clouds

    Poor for stargazing
    • Cloud
      Cover
      76%
    • Precip
      55%
    • Hours of Precip
      3
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Fri
6pm
7pm 8pm 9pm 10pm 11pm Sat
12am
1am
  6pm 7pm 8pm 9pm 10pm 11pm 12am 1am
Forecast
Mostly Sunny
Mostly Sunny
Mostly Clear
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Temp (°F) 63° 60° 57° 55° 55° 54° 53° 53°
RealFeel® 59° 55° 52° 50° 50° 49° 48° 49°
Humidity 62% 67% 72% 78% 79% 81% 83% 84%
   
  6pm 7pm 8pm 9pm 10pm 11pm 12am 1am
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%
   
  6pm 7pm 8pm 9pm 10pm 11pm 12am 1am
Wind (mph) 10 W 9 W 8 W 7 W 7 WSW 6 WSW 6 WSW 6 WSW
UV Index 1 0 0 0 0 0 0 0
Cloud Cover 12% 14% 26% 45% 45% 45% 45% 45%
Dew Point 49° 49° 48° 48° 48° 48° 48° 48°
Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F Middle Grid line 50 F

Temperature History - Apr 18

more Historical Weather Data >
  Today Normal Record 4/18/2013
High 67° N/A N/A 74°
Low 49° N/A N/A 45°

Solunar Information for Castro Valley, CA

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:31 AM with 13:15 of sunlight, then sets at 7:46 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 10:34 PM with 10:25 of moolight, then sets at 8:59 AM

Tue, Apr 22
Last
Tue, Apr 29
New
Wed, May 7
First
Wed, May 14
Full
Top Story

Castro Valley Weather Report

San Francisco: No Rain in Sight, Morning Clouds to Break for Afternoon Sunshine

April 17, 2014; 12:46 PM ET

For the remainder of the week and into the weekend, morning clouds will give way to mostly sunny skies. 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