• Today

    Oct 31

    65°Lo 52°

    Rain; breezy, not as warm

    Beneficial weather for sinus headaches
    • Hi
      RealFeel
      60°
    • UV
      2 - Low
    • Cloud
      Cover
      89%
    more
  • Sat

    Nov 1

    64°Lo 47°

    Clouds and sun with a shower

    Neutral weather for sinus headaches
    • Hi
      RealFeel
      61°
    • UV
      3 - Moderate
    • Cloud
      Cover
      63%
    more
  • Sun

    Nov 2

    67°Lo 43°

    Mostly sunny

    Neutral weather for sinus headaches
    • Hi
      RealFeel
      65°
    • UV
      3 - Moderate
    • Cloud
      Cover
      11%
  • Mon

    Nov 3

    69°Lo 48°

    Sunshine and patchy clouds

    Neutral weather for sinus headaches
    • Hi
      RealFeel
      71°
    • UV
      3 - Moderate
    • Cloud
      Cover
      25%
    more
  • Tue

    Nov 4

    71°Lo 49°

    Sunny and pleasant

    Neutral weather for sinus headaches
    • Hi
      RealFeel
      71°
    • UV
      3 - Moderate
    • Cloud
      Cover
      10%
    more
Next Previous
Hi 67° RealFeel® 65° Precipitation 2%

Day

N

E

S

W

  • WNW 7 mph
  • Gusts: 13 mph

Mostly sunny

  • Max UV Index: 3 (Moderate)
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 43° RealFeel® 42° Precipitation 1%

Night

N

E

S

W

  • NNW 4 mph
  • Gusts: 7 mph

Mainly clear and chilly

  • Max UV Index: N/A
  • Thunderstorms: 0%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Nov 2

more Historical Weather Data >
  Today Normal Record 11/2/2013
High 67° N/A N/A 65°
Low 43° N/A N/A 47°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:35 AM with 10:34 of sunlight, then sets at 6:09 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 3:39 PM with 12:17 of moolight, then sets at 3:56 AM

Castro Valley Weather Report

San Francisco: Showers to Dampen Halloween Weekend

October 31, 2014; 5:03 AM ET

Showers are expected to fall over the Bay Area over the Halloween weekend, potentially dampening some holiday plans. more >

New Year, New You

Dec 24, 2012; 5:00 AM ET Start 2013 right with these tips on how to set realistic New Year's resolutions!

Sun. Sinus Headache

Sun. UV Index