• Sun

    May 29

    78°Lo 54°

    Low clouds, then sunshine

    Beneficial weather for migraines
    • Hi
      RealFeel
      82°
    • UV
      7 - Very High
    • Cloud
      Cover
      57%
    more
  • Mon

    May 30

    75°Lo 51°

    Sunshine and pleasant

    Beneficial weather for migraines
    • Hi
      RealFeel
      80°
    • UV
      7 - Very High
    • Cloud
      Cover
      25%
    more
  • Tue

    May 31

    76°Lo 56°

    Mostly sunny and pleasant

    Beneficial weather for migraines
    • Hi
      RealFeel
      82°
    • UV
      7 - Very High
    • Cloud
      Cover
      25%
    more
  • Wed

    Jun 1

    76°Lo 60°

    Partly sunny

    Beneficial weather for migraines
    • Hi
      RealFeel
      78°
    • UV
      7 - Very High
    • Cloud
      Cover
      30%
    more
  • Thu

    Jun 2

    76°Lo 58°

    Mostly sunny

    Beneficial weather for migraines
    • Hi
      RealFeel
      78°
    • UV
      7 - Very High
    • Cloud
      Cover
      17%
Next Previous
Hi 76° RealFeel® 78° Precipitation 0%

Day

N

E

S

W

  • W 10 mph
  • Gusts: 32 mph

Mostly sunny

  • Max UV Index: 9 (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 58° RealFeel® 57° Precipitation 0%

Night

N

E

S

W

  • W 7 mph
  • Gusts: 29 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 - Jun 2

more Historical Weather Data >
  Today Normal Record 6/2/2015
High 76° 74° N/A 64°
Low 58° 53° N/A 55°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 5:48 AM with 14:38 of sunlight, then sets at 8:26 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 4:10 AM with 13:38 of moolight, then sets at 5:48 PM

Castro Valley Weather Report

San Francisco: Cool, cloudy weather to last though midweek

May 24, 2016; 8:25 PM ET

The last full week of May will kick off with cloudy and cool conditions in the Bay Area with rain remaining absent from the forecast. more >