• Tonight

    May 26

    Lo 54°

    Thickening clouds

    Stargazing Weather
    • Cloud
      Cover
      83%
    • Precip
      1%
    • Hours of Precip
      0
  • Wed

    May 27

    65°Lo 52°

    Low clouds, then some sun

    Poor for stargazing
    • Cloud
      Cover
      85%
    • Precip
      1%
    • Hours of Precip
      0
    more
  • Thu

    May 28

    65°Lo 54°

    Low clouds, then some sun

    Good for stargazing
    • Cloud
      Cover
      76%
    • Precip
      3%
    • Hours of Precip
      0
    more
  • Fri

    May 29

    70°Lo 55°

    Clearing and pleasant

    Very Good for stargazing
    • Cloud
      Cover
      22%
    • Precip
      1%
    • Hours of Precip
      0
    more
  • Sat

    May 30

    70°Lo 55°

    Partly sunny and pleasant

    Fair for stargazing
    • Cloud
      Cover
      53%
    • Precip
      3%
    • Hours of Precip
      0
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Tue
11pm
Wed
12am
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  11pm 12am 1am 2am 3am 4am 5am 6am
Forecast
Mostly Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Temp (°F) 55° 54° 54° 54° 54° 54° 54° 54°
RealFeel® 51° 51° 51° 52° 52° 52° 52° 52°
Humidity 86% 88% 89% 90% 89% 89% 90% 90%
   
  11pm 12am 1am 2am 3am 4am 5am 6am
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
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  11pm 12am 1am 2am 3am 4am 5am 6am
Wind (mph) 9 W 8 W 7 W 7 WSW 6 WSW 6 WSW 6 WSW 6 WSW
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 76% 69% 61% 100% 100% 95% 95% 95%
Dew Point 51° 51° 51° 51° 51° 51° 51° 51°
Middle Grid line 60 F Middle Grid line 55 F Middle Grid line 50 F

Temperature History - May 26

more Historical Weather Data >
  Today Normal Record 5/26/2014
High 64° N/A N/A 77°
Low 54° N/A N/A 50°

Solunar Information for Castro Valley, CA

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:51 AM with 14:29 of sunlight, then sets at 8:20 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:55 PM with 12:34 of moolight, then sets at 2:29 AM

Tue, Jun 2
Full
Tue, Jun 9
Last
Tue, Jun 16
New
Wed, Jun 24
First

Castro Valley Weather Report

San Francisco: Seasonable, Dry Weather to Remain Through Late Week

May 26, 2015; 7:45 PM ET

Dry and seasonable weather is forecast for San Francisco this week. 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.

Tue. Stargazing