• Early AM

    May 3

    Lo 53°

    Cloudy

    Migraine Headache Weather
    • Hi
      RealFeel
      79°
    • UV
      7 - Very High
    • Cloud
      Cover
      82%
    more
  • Today

    May 3

    71°Lo 54°

    Clouds giving way to some sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      76°
    • UV
      5 - High
    • Cloud
      Cover
      86%
    more
  • Wed

    May 4

    68°Lo 55°

    An afternoon shower in spots

    Beneficial weather for migraines
    • Hi
      RealFeel
      71°
    • UV
      5 - High
    • Cloud
      Cover
      95%
    more
  • Thu

    May 5

    65°Lo 53°

    Variable clouds, a t-storm

    Beneficial weather for migraines
    • Hi
      RealFeel
      69°
    • UV
      5 - High
    • Cloud
      Cover
      81%
    more
  • Fri

    May 6

    66°Lo 53°

    Clouds and sun with a t-storm

    Beneficial weather for migraines
    • Hi
      RealFeel
      68°
    • UV
      4 - Moderate
    • Cloud
      Cover
      96%
Next Previous
Hi 66° RealFeel® 68° Precipitation 55%

Day

N

E

S

W

  • SW 9 mph
  • Gusts: 15 mph

Intervals of clouds and sunshine with a shower or thunderstorm

  • Max UV Index: 5 (Moderate)
  • Thunderstorms: 40%
  • Precipitation: 0.11 in
  • Rain: 0.11 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 1.5 hrs
  • Hours of Rain: 1.5 hrs
Lo 53° RealFeel® 51° Precipitation 62%

Night

N

E

S

W

  • SW 5 mph
  • Gusts: 10 mph

Cloudy; a couple of showers in the evening followed by occasional rain and drizzle late

  • Max UV Index: N/A
  • Thunderstorms: 20%
  • Precipitation: 0.1 in
  • Rain: 0.1 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 2.5 hrs
  • Hours of Rain: 2.5 hrs

Temperature History - May 6

more Historical Weather Data >
  Today Normal Record 5/6/2015
High 66° 70° N/A 65°
Low 53° 50° N/A 49°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:06 AM with 13:58 of sunlight, then sets at 8:04 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 6:19 AM with 13:52 of moolight, then sets at 8:11 PM

Castro Valley Weather Report

San Francisco: Showery weather to arrive by late week

May 2, 2016; 12:34 PM ET

Clouds and showers will move into the Bay Area following a dry start to May. more >

Fri. Migraine Headache

Fri. UV Index