• Today

    Feb 28

    61°Lo 44°

    Variable cloudiness

    Fair for an outdoor bbq
    • Precip
      50%
    • Hi
      RealFeel
      64°
    • Wind
      Gust
      13 mph
    more
  • Sun

    Mar 1

    63°Lo 44°

    Partly sunny

    Very Good for an outdoor bbq
    • Precip
      8%
    • Hi
      RealFeel
      66°
    • Wind
      Gust
      8 mph
    more
  • Mon

    Mar 2

    61°Lo 42°

    A passing shower or two

    Poor for an outdoor bbq
    • Precip
      56%
    • Hi
      RealFeel
      67°
    • Wind
      Gust
      14 mph
    more
  • Tue

    Mar 3

    63°Lo 41°

    Plenty of sunshine

    Very Good for an outdoor bbq
    • Precip
      5%
    • Hi
      RealFeel
      66°
    • Wind
      Gust
      12 mph
  • Wed

    Mar 4

    66°Lo 41°

    Plenty of sun

    Excellent for an outdoor bbq
    • Precip
      7%
    • Hi
      RealFeel
      72°
    • Wind
      Gust
      7 mph
    more
Next Previous
Hi 63° RealFeel® 66° Precipitation 5%

Day

N

E

S

W

  • W 7 mph
  • Gusts: 12 mph

Plenty of sunshine

  • Max UV Index: 5 (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 41° RealFeel® 41° Precipitation 2%

Night

N

E

S

W

  • NW 4 mph
  • Gusts: 9 mph

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 - Mar 3

more Historical Weather Data >
  Today Normal Record 3/3/2014
High 63° N/A N/A 58°
Low 41° N/A N/A 48°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:37 AM with 11:27 of sunlight, then sets at 6:04 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 4:34 PM with 13:18 of moolight, then sets at 5:52 AM

Castro Valley Weather Report

Western Storm to Deliver Fraction of Much-Needed Rain, Snow

February 28, 2015; 6:37 PM ET

A slow-moving storm will continue to affect the West this weekend and into the first part of next week with rounds of precipitation for some needy areas as well as trouble for travelers. 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.

Tue. Outdoor Entertaining

Tue. Wind Maps

Tue. UV Index