• Today

    May 6

    64°Lo 54°

    Clouds and sun with a t-storm

    Beneficial weather for migraines
    • Hi
      RealFeel
      68°
    • UV
      5 - High
    • Cloud
      Cover
      69%
  • Sat

    May 7

    66°Lo 55°

    Times of clouds and sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      70°
    • UV
      4 - Moderate
    • Cloud
      Cover
      70%
    more
  • Sun

    May 8

    69°Lo 53°

    Partly sunny

    Beneficial weather for migraines
    • Hi
      RealFeel
      72°
    • UV
      5 - High
    • Cloud
      Cover
      45%
    more
  • Mon

    May 9

    70°Lo 50°

    Mostly sunny and pleasant

    Beneficial weather for migraines
    • Hi
      RealFeel
      74°
    • UV
      7 - Very High
    • Cloud
      Cover
      21%
    more
  • Tue

    May 10

    74°Lo 51°

    Mostly sunny and pleasant

    Beneficial weather for migraines
    • Hi
      RealFeel
      79°
    • UV
      7 - Very High
    • Cloud
      Cover
      23%
    more
Next Previous
Cloudy 57° RealFeel® 55°

N

E

S

W

  • Humidity: 80%
  • Pressure: 29.87 in
  • UV Index: 0
  • Cloud Cover: 100%
  • Ceiling: 4700 ft
  • Dew Point: 51° F
  • Visibility: 10 mi
6 mph

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

Temperature Summary - 6:49 AM

  Temp (°F)
Now 57°
Yesterday 55°
RealFeel® 55°
RealFeel® Shade 55°
Wind Chill 57°
Dew Point 51°
  Hi / Lo
Previous 6 Hours 59°
  55°
Previous 12 Hours 65°
  55°
Previous 24 Hours 68°
  55°

Temperature History - May 6

more Historical Weather Data >
  Today Normal Record 5/6/2015
High 64° 70° N/A 65°
Low 54° 50° N/A 49°

Precipitation Summary - 6:49 AM

  Amount (in)
Previous 1 Hour 0
Previous 3 Hours 0
Previous 6 Hours 0
Previous 9 Hours 0.01
Previous 12 Hours 0.01
Previous 18 Hours 0.11
Previous 24 Hours 0.16

Castro Valley Weather Report

San Francisco: Rain showers may dampen the Bay Area into weekend

May 6, 2016; 3:40 AM ET

While it will not be an all-day washout into Saturday morning, any developing thunderstorm could produce locally heavy rainfall and raise the risk for flash flooding and mudslides. more >

Fri. Migraine Headache

Fri. UV Index