• Today

    Jul 5

    76°Lo 60°

    Clouds, then sun

    Beneficial weather for asthma
    • Hi
      RealFeel
      80°
    • UV
      8 - Very High
    • Air Qual.
      Good
  • Mon

    Jul 6

    75°Lo 59°

    Clouds breaking for sun

    Beneficial weather for asthma
    • Hi
      RealFeel
      78°
    • UV
      8 - Very High
    • Air Qual.
      Good
    more
  • Tue

    Jul 7

    72°Lo 59°

    Clouds, then sun

    Beneficial weather for asthma
    • Hi
      RealFeel
      75°
    • UV
      8 - Very High
    • Air Qual.
      Good
    more
  • Wed

    Jul 8

    71°Lo 59°

    Low clouds breaking

    Beneficial weather for asthma
    • Hi
      RealFeel
      74°
    • UV
      8 - Very High
    • Cloud
      Cover
      62%
    more
  • Thu

    Jul 9

    70°Lo 59°

    Some sunshine

    Beneficial weather for asthma
    • Hi
      RealFeel
      73°
    • UV
      8 - Very High
    • Cloud
      Cover
      45%
    more
Next Previous
Hi 76° RealFeel® 80° Precipitation 2%

Day

N

E

S

W

  • WNW 10 mph
  • Gusts: 18 mph

Low clouds giving way to sunshine

  • Max UV Index: 8 (Very High)
  • Thunderstorms: 1%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 60° RealFeel® 59° Precipitation 2%

Night

N

E

S

W

  • WNW 7 mph
  • Gusts: 15 mph

Clear to partly cloudy this evening; late-night low clouds

  • 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 - Jul 5

more Historical Weather Data >
  Today Normal Record 7/5/2014
High 76° N/A N/A 81°
Low 60° N/A N/A 52°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:52 AM with 14:41 of sunlight, then sets at 8:33 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 11:13 PM with 11:53 of moolight, then sets at 11:06 AM

Castro Valley Weather Report

San Francisco: Cooler, Comfortable Conditions to Start Week

July 5, 2015; 1:57 PM ET

The San Francisco area will remain cool and comfortable into the early part of the upcoming workweek. more >

The Dangers of Bus Travel

Dec 10, 2012; 5:00 AM ET While bus transportation is one of the most affordable, it is important to know which motor coach companies rank highest in safety.

Sun. Air Quality

Sun. Asthma Risk

Sun. UV Index