• Tonight

    Feb 10

    Lo 50°

    Partly cloudy

    Asthma Weather
    • Hi
      RealFeel
      70°
    • UV
      4 - Moderate
    • Air Qual.
      Good
  • Thu

    Feb 11

    69°Lo 50°

    Periods of clouds and sun

    Beneficial weather for asthma
    • Hi
      RealFeel
      71°
    • UV
      4 - Moderate
    • Air Qual.
      Moderate
    more
  • Fri

    Feb 12

    66°Lo 48°

    Intervals of clouds and sun

    Beneficial weather for asthma
    • Hi
      RealFeel
      67°
    • UV
      4 - Moderate
    • Air Qual.
      Good
    more
  • Sat

    Feb 13

    66°Lo 45°

    Partly sunny

    Beneficial weather for asthma
    • Hi
      RealFeel
      68°
    • UV
      4 - Moderate
    • Air Qual.
      Good
    more
  • Sun

    Feb 14

    68°Lo 49°

    Mostly sunny

    Beneficial weather for asthma
    • Hi
      RealFeel
      71°
    • UV
      4 - Moderate
    • Air Qual.
      Good
    more
Next Previous
Hi 67° RealFeel® 70° Precipitation 4%

Day

N

E

S

W

  • N 5 mph
  • Gusts: 9 mph

Partly sunny

  • Max UV Index: 3 (Moderate)
  • 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 50° RealFeel® 51° Precipitation 5%

Night

N

E

S

W

  • ENE 2 mph
  • Gusts: 6 mph

Partly cloudy

  • 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 - Feb 10

more Historical Weather Data >
  Today Normal Record 2/10/2015
High 67° 60° N/A 63°
Low 50° 45° N/A 45°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 7:04 AM with 10:38 of sunlight, then sets at 5:42 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 8:21 AM with 12:07 of moolight, then sets at 8:28 PM

Castro Valley Weather Report

San Francisco: Dry and mild into the weekend

February 10, 2016; 10:15 AM ET

The summerlike warmth that set records during the first part of the week will fade by the weekend, but temperatures will remain above normal. more >

Wed. Air Quality

Wed. Asthma Risk

Wed. UV Index