• Today

    May 4

    63°Lo 49°

    Low clouds, then sun

    Excellent for biking
    • Precip
      2%
    • Hours of Precip
      0
    • Wind
      Gust
      21 mph
  • Tue

    May 5

    65°Lo 48°

    Low clouds, then sunshine

    Excellent for biking
    • Precip
      2%
    • Hours of Precip
      0
    • Wind
      Gust
      21 mph
    more
  • Wed

    May 6

    66°Lo 48°

    Sunshine; breezy in the p.m.

    Excellent for biking
    • Precip
      7%
    • Hours of Precip
      0
    • Wind
      Gust
      22 mph
    more
  • Thu

    May 7

    69°Lo 48°

    Times of clouds and sun

    Excellent for biking
    • Precip
      6%
    • Hours of Precip
      0
    • Wind
      Gust
      22 mph
    more
  • Fri

    May 8

    69°Lo 50°

    Times of clouds and sun

    Excellent for biking
    • Precip
      3%
    • Hours of Precip
      0
    • Wind
      Gust
      21 mph
    more
Next Previous
Partly sunny 59° RealFeel® 62°

N

E

S

W

  • Humidity: 64%
  • Pressure: 30.01 in ↓
  • UV Index: 7
  • Cloud Cover: 35%
  • Ceiling: 21400 ft
  • Dew Point: 47° F
  • Visibility: 10 mi
13 mph

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:10 AM with 13:51 of sunlight, then sets at 8:01 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:46 PM with 10:38 of moolight, then sets at 7:24 AM

Temperature Summary - 1:18 PM

  Temp (°F)
Now 59°
Yesterday 55°
RealFeel® 62°
RealFeel® Shade 54°
Wind Chill 59°
Dew Point 47°
  Hi / Lo
Previous 6 Hours 59°
  52°
Previous 12 Hours 59°
  50°
Previous 24 Hours 66°
  50°

Temperature History - May 4

more Historical Weather Data >
  Today Normal Record 5/4/2014
High 63° N/A N/A 64°
Low 49° N/A N/A 53°

Precipitation Summary - 1:18 PM

  Amount (in)
Previous 1 Hour 0
Previous 3 Hours 0
Previous 6 Hours 0
Previous 9 Hours 0
Previous 12 Hours 0
Previous 18 Hours 0
Previous 24 Hours 0

Castro Valley Weather Report

San Francisco: Seasonable Temperatures to Continue Through Week

May 4, 2015; 1:42 PM ET

A pattern of seasonable temperatures will continue through the first part of the new week, with low clouds in the morning and sunny conditions through the afternoon. 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.