• Today

    Aug 3

    72°Lo 62°

    Clouds, then sun

    Beneficial weather for colds
    • Avg
      Temp
      67°
    • Avg
      RealFeel
      68°
    • Hi
      RealFeel
      75°
  • Tue

    Aug 4

    73°Lo 59°

    Low clouds, then some sun

    Beneficial weather for colds
    • Avg
      Temp
      66°
    • Avg
      RealFeel
      66°
    • Hi
      RealFeel
      75°
    more
  • Wed

    Aug 5

    77°Lo 56°

    Low clouds, then sunshine

    Beneficial weather for colds
    • Avg
      Temp
      67°
    • Avg
      RealFeel
      68°
    • Hi
      RealFeel
      80°
    more
  • Thu

    Aug 6

    79°Lo 58°

    Partly sunny and pleasant

    Beneficial weather for colds
    • Avg
      Temp
      69°
    • Avg
      RealFeel
      71°
    • Hi
      RealFeel
      84°
    more
  • Fri

    Aug 7

    77°Lo 61°

    Low clouds, then some sun

    Beneficial weather for colds
    • Avg
      Temp
      69°
    • Avg
      RealFeel
      69°
    • Hi
      RealFeel
      79°
    more
Next Previous
Hi 72° RealFeel® 75° Precipitation 2%

Day

N

E

S

W

  • WNW 13 mph
  • Gusts: 21 mph

Low clouds giving way to sunshine

  • 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 62° RealFeel® 60° Precipitation 4%

Night

N

E

S

W

  • W 8 mph
  • Gusts: 17 mph

Mainly clear this evening followed by late-night low clouds

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

Temperature History - Aug 3

more Historical Weather Data >
  Today Normal Record 8/3/2014
High 72° N/A N/A 67°
Low 62° N/A N/A 57°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:14 AM with 14:01 of sunlight, then sets at 8:15 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 10:28 PM with 12:42 of moolight, then sets at 11:10 AM

Castro Valley Weather Report

San Francisco: Seasonable Conditions to Persist Through Week

August 3, 2015; 7:50 AM ET

Dry and seasonable conditions will continue across the San Francisco Bay area this week. more >

Natural Ways To Combat Colds and Flu

Nov 30, 2012; 5:00 AM ET Flu season is here and will stick around until May. Here are a few natural remedies to ease pain and suffering.

Mon. Cold & Flu

Mon. UV Index