• Today

    Oct 25

    69°Lo 54°

    Mostly cloudy with a shower

    Poor for home energy
    • Avg
      RealFeel
      59°
    • Hi
      RealFeel
      66°
    • Wind
      Speed
      13 mph
  • Sun

    Oct 26

    69°Lo 50°

    Times of clouds and sun

    Poor for home energy
    • Avg
      RealFeel
      57°
    • Hi
      RealFeel
      66°
    • Wind
      Speed
      9 mph
    more
  • Mon

    Oct 27

    69°Lo 49°

    Partly sunny

    Poor for home energy
    • Avg
      RealFeel
      58°
    • Hi
      RealFeel
      67°
    • Wind
      Speed
      7 mph
    more
  • Tue

    Oct 28

    72°Lo 52°

    Partly sunny

    Poor for home energy
    • Avg
      RealFeel
      62°
    • Hi
      RealFeel
      73°
    • Wind
      Speed
      6 mph
    more
  • Wed

    Oct 29

    76°Lo 54°

    Sunny and pleasant

    Poor for home energy
    • Avg
      RealFeel
      66°
    • Hi
      RealFeel
      78°
    • Wind
      Speed
      5 mph
    more
Next Previous
Hi 69° RealFeel® 66° Precipitation 60%

Day

N

E

S

W

  • WSW 13 mph
  • Gusts: 20 mph

Cloudy most of the time with a shower; breezy this afternoon

  • Max UV Index: 3 (Moderate)
  • Thunderstorms: 20%
  • Precipitation: 0.14 in
  • Rain: 0.14 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 2 hrs
  • Hours of Rain: 2 hrs
Lo 54° RealFeel® 52° Precipitation 63%

Night

N

E

S

W

  • NW 5 mph
  • Gusts: 13 mph

A couple of evening showers; otherwise, mainly cloudy

  • Max UV Index: N/A
  • Thunderstorms: 20%
  • Precipitation: 0.06 in
  • Rain: 0.06 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1 hrs
  • Hours of Rain: 1 hrs

Temperature History - Oct 25

more Historical Weather Data >
  Today Normal Record 10/25/2013
High 69° N/A N/A 70°
Low 54° N/A N/A 49°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:26 AM with 10:52 of sunlight, then sets at 6:18 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 9:10 AM with 10:37 of moolight, then sets at 7:47 PM

Castro Valley Weather Report

A few showers to San Francisco for World Series Game Four

October 25, 2014; 2:06 PM ET

Those headed to Game 4 of the World Series Saturday evening might want to take their rain gear with them as showers are forecast to linger through the evening. more >

Energy Efficient Lightbulbs and S.A.D

Sep 8, 2012; 5:00 AM ET With shorter days and colder nights in the fall and winter, some people develop seasonal affective disorder. When shopping for lightbulbs to treat the 'winter blues,'consider energy-efficient bulbs.

Sat. Home Energy Efficiency

Sat. Degree Days

Sat. UV Index