• Friday

    Jul 29

    85°Lo 59°

    Remaining warm with sunshine

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      89°
    • UV
      7 - Very High
    • Cloud
      Cover
      19%
    more
  • Saturday

    Jul 30

    82°Lo 59°

    Mostly sunny

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      85°
    • UV
      7 - Very High
    • Cloud
      Cover
      19%
    more
  • Sunday

    Jul 31

    78°Lo 58°

    Mostly sunny and pleasant

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      80°
    • UV
      7 - Very High
    • Cloud
      Cover
      21%
    more
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Castro Valley Weather Report

90-degree heat to build across northwestern US this week

July 26, 2016; 7:48 AM ET

Dangerous heat will surge northward and send temperatures rising across the northwestern United States this week. more >

Aches & Pains Live Feed

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Fri. Sinus Headache

Fri. UV Index