• Friday

    Sep 11

    75°Lo 56°

    Partly sunny

    Very Good for stargazing
    • Cloud
      Cover
      32%
    • Precip
      0%
    • Hours of Precip
      0
    more
  • Saturday

    Sep 12

    88°Lo 60°

    Mostly cloudy and warmer

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

    Sep 13

    80°Lo 62°

    Mostly sunny

    Very Good for stargazing
    • Cloud
      Cover
      32%
    • Precip
      0%
    • Hours of Precip
      0
    more
Next Previous

Castro Valley Weather Report

San Francisco: Pleasant Stretch Continues Through Labor Day

September 5, 2015; 6:08 AM ET

As a ridge moves in from the west over the weekend and early next week, high temperatures will swing back above normal. more >

Astronomy Live Feed

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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.