• Today

    Apr 29

    68°Lo 48°

    Partly sunny and nice

    Beneficial weather for colds
    • Avg
      Temp
      58°
    • Avg
      RealFeel
      60°
    • Hi
      RealFeel
      72°
    more
  • Sat

    Apr 30

    78°Lo 53°

    Mostly sunny and warmer

    Beneficial weather for colds
    • Avg
      Temp
      66°
    • Avg
      RealFeel
      66°
    • Hi
      RealFeel
      78°
  • Sun

    May 1

    80°Lo 52°

    Sunny and very warm

    Beneficial weather for colds
    • Avg
      Temp
      66°
    • Avg
      RealFeel
      71°
    • Hi
      RealFeel
      90°
    more
  • Mon

    May 2

    74°Lo 50°

    Mostly sunny and nice

    Beneficial weather for colds
    • Avg
      Temp
      62°
    • Avg
      RealFeel
      65°
    • Hi
      RealFeel
      78°
    more
  • Tue

    May 3

    71°Lo 51°

    Partly sunny and nice

    Beneficial weather for colds
    • Avg
      Temp
      61°
    • Avg
      RealFeel
      64°
    • Hi
      RealFeel
      76°
    more
Next Previous
Hi 78° RealFeel® 78° Precipitation 10%

Day

N

E

S

W

  • N 13 mph
  • Gusts: 21 mph

Mostly sunny and warmer; breezy in the afternoon

  • Max UV Index: 8 (Very High)
  • 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 53° RealFeel® 54° Precipitation 6%

Night

N

E

S

W

  • NNE 4 mph
  • Gusts: 13 mph

Mainly clear

  • 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 - Apr 30

more Historical Weather Data >
  Today Normal Record 4/30/2015
High 78° 69° N/A 87°
Low 53° 49° N/A 49°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:13 AM with 13:46 of sunlight, then sets at 7:59 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 2:17 AM with 10:59 of moolight, then sets at 1:16 PM

Castro Valley Weather Report

San Francisco: Dry, pleasant weather to unfold through weekend

April 29, 2016; 5:10 AM ET

Sunny and pleasant conditions will return to the San Francisco Bay Area for the end of the week and through the weekend. more >

Flu Season is Just Around the Corner

Sep 11, 2012; 2:00 PM ET The peak of flu season may not be until January, but preparations should begin now. Adrienne Veilleux has more.

Sat. Cold & Flu

Sat. UV Index