• Early AM

    Sep 23

    Lo 62°

    Increasing clouds

    Stargazing Weather
    • Cloud
      Cover
      52%
    • Precip
      0%
    • Hours of Precip
      0
    more
  • Today

    Sep 23

    77°Lo 64°

    Areas of low clouds, then sun

    Good for stargazing
    • Cloud
      Cover
      47%
    • Precip
      6%
    • Hours of Precip
      0
  • Wed

    Sep 24

    78°Lo 65°

    Partial sunshine

    Fair for stargazing
    • Cloud
      Cover
      82%
    • Precip
      55%
    • Hours of Precip
      1
    more
  • Thu

    Sep 25

    75°Lo 58°

    Some sun with a few showers

    Fair for stargazing
    • Cloud
      Cover
      12%
    • Precip
      10%
    • Hours of Precip
      2
    more
  • Fri

    Sep 26

    72°Lo 59°

    Partly sunny

    Excellent for stargazing
    • Cloud
      Cover
      18%
    • Precip
      4%
    • Hours of Precip
      0
    more
Next Previous
Mostly cloudy 64° RealFeel® 65°

N

E

S

W

  • Humidity: 87%
  • Pressure: 29.98 in ↓
  • UV Index: 0
  • Cloud Cover: 75%
  • Ceiling: 38300 ft
  • Dew Point: 61° F
  • Visibility: 10 mi
4 mph

Temperature Summary - 3:03 AM

  Temp (°F)
Now 64°
Yesterday 62°
RealFeel® 65°
RealFeel® Shade 65°
Wind Chill 64°
Dew Point 61°
  Hi / Lo
Previous 6 Hours 67°
  63°
Previous 12 Hours 77°
  63°
Previous 24 Hours 79°
  62°

Temperature History - Sep 23

more Historical Weather Data >
  Today Normal Record 9/23/2013
High 77° N/A N/A 77°
Low 64° N/A N/A 54°

Precipitation Summary - 3:03 AM

  Amount (in)
Previous 1 Hour 0
Previous 3 Hours 0
Previous 6 Hours 0
Previous 9 Hours 0
Previous 12 Hours 0
Previous 18 Hours 0
Previous 24 Hours 0

Solunar Information for Castro Valley, CA

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:57 AM with 12:07 of sunlight, then sets at 7:04 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 6:27 AM with 12:18 of moolight, then sets at 6:45 PM

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

Castro Valley Weather Report

Dry, Sunny Weather Continues for Much of the Week in San Francisco

September 23, 2014; 3:19 AM ET

Sunshine will continue for much of the region this week. more >

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Dec 14, 2012; 5:00 AM ET The Mars Science Laboratory Rover 'Curiosity' continues its sampling and analyzing of the Martian surface.

Tue. Stargazing