• Today

    Feb 5

    62°Lo 42°

    Mostly sunny

    Very Good for an outdoor bbq
    • Precip
      3%
    • Hi
      RealFeel
      64°
    • Wind
      Speed
      5 mph
    more
  • Sat

    Feb 6

    65°Lo 45°

    Mostly sunny

    Very Good for an outdoor bbq
    • Precip
      8%
    • Hi
      RealFeel
      68°
    • Wind
      Speed
      5 mph
  • Sun

    Feb 7

    68°Lo 46°

    Plenty of sunshine

    Very Good for an outdoor bbq
    • Precip
      1%
    • Hi
      RealFeel
      68°
    • Wind
      Speed
      6 mph
    more
  • Mon

    Feb 8

    70°Lo 47°

    Plenty of sunshine

    Excellent for an outdoor bbq
    • Precip
      2%
    • Hi
      RealFeel
      70°
    • Wind
      Speed
      6 mph
    more
  • Tue

    Feb 9

    70°Lo 46°

    Sunny

    Excellent for an outdoor bbq
    • Precip
      6%
    • Hi
      RealFeel
      73°
    • Wind
      Speed
      5 mph
    more
Next Previous
Hi 65° RealFeel® 68° Precipitation 8%

Day

N

E

S

W

  • NE 5 mph
  • Gusts: 7 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 45° RealFeel® 45° Precipitation 0%

Night

N

E

S

W

  • ENE 4 mph
  • Gusts: 6 mph

Clear to partly cloudy

  • 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 - Feb 6

more Historical Weather Data >
  Today Normal Record 2/6/2015
High 65° 60° N/A 60°
Low 45° 44° N/A 54°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:08 AM with 10:30 of sunlight, then sets at 5:38 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 5:26 AM with 10:33 of moolight, then sets at 3:59 PM

Castro Valley Weather Report

Super Bowl Sunday: Break in wet El Nino-driven weather pattern to arrive in time for big game

February 5, 2016; 4:05 PM ET

Dry conditions and above-normal temperatures are expected for Super Bowl Sunday in Santa Clara, California. more >

Is Your Outdoor Gear Waterproof?

Dec 5, 2012; 5:00 AM ET Now that it's cold enough to hit the slopes, you may want to look more closely at what materials your winter sports gear is made of. As it turns out, not all waterproofing is created equal.

Sat. Outdoor Entertaining

Sat. Wind Maps

Sat. UV Index