• Tue

    May 10

    73°Lo 50°

    Sunshine and patchy clouds

    Beneficial weather for migraines
    • Hi
      RealFeel
      77°
    • UV
      7 - Very High
    • Cloud
      Cover
      71%
    more
  • Wed

    May 11

    75°Lo 50°

    Partly sunny

    Beneficial weather for migraines
    • Hi
      RealFeel
      82°
    • UV
      7 - Very High
    • Cloud
      Cover
      97%
  • Thu

    May 12

    65°Lo 53°

    A couple of showers possible

    Beneficial weather for migraines
    • Hi
      RealFeel
      71°
    • UV
      5 - High
    • Cloud
      Cover
      50%
    more
  • Fri

    May 13

    65°Lo 48°

    Mostly sunny

    Beneficial weather for migraines
    • Hi
      RealFeel
      68°
    • UV
      7 - Very High
    • Cloud
      Cover
      45%
    more
  • Sat

    May 14

    81°Lo 60°

    Abundant sunshine and warmer

    Beneficial weather for migraines
    • Hi
      RealFeel
      84°
    • UV
      7 - Very High
    • Cloud
      Cover
      0%
    more
Next Previous
Hi 75° RealFeel® 82° Precipitation 0%

Day

N

E

S

W

  • WSW 5 mph
  • Gusts: 20 mph

Partly sunny

  • 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 50° RealFeel® 50° Precipitation 0%

Night

N

E

S

W

  • WSW 4 mph
  • Gusts: 14 mph

Overcast

  • 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 - May 11

more Historical Weather Data >
  Today Normal Record 5/11/2015
High 75° 70° N/A 56°
Low 50° 51° N/A 48°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:01 AM with 14:07 of sunlight, then sets at 8:08 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 10:53 AM with 14:11 of moolight, then sets at 1:04 AM

Castro Valley Weather Report

San Francisco: Rain showers may dampen the Bay Area for midweek

May 1, 2016; 6:27 AM ET

There is the potential a storm will dive across California and bring a soaking rain for later next week and weekend. more >