• Today

    Jul 5

    76°Lo 60°

    Clouds, then sun

    Beneficial weather for asthma
    • Hi
      RealFeel
      80°
    • UV
      8 - Very High
    • Air Qual.
      Good
    more
  • 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
  • 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 72° RealFeel® 75° Precipitation 3%

Day

N

E

S

W

  • WNW 12 mph
  • Gusts: 20 mph

Low clouds followed by sunshine; 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 59° RealFeel® 57° Precipitation 3%

Night

N

E

S

W

  • WSW 8 mph
  • Gusts: 16 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 - Jul 7

more Historical Weather Data >
  Today Normal Record 7/7/2014
High 72° N/A N/A 74°
Low 59° N/A N/A 53°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:53 AM with 14:40 of sunlight, then sets at 8:33 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:47 PM with 15:26 of moolight, then sets at 12:14 PM

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.

Tue. Asthma Risk

Tue. UV Index