• Thu

    Mar 5

    67°Lo 45°

    Plenty of sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      72°
    • UV
      5 - Moderate
    • Cloud
      Cover
      0%
    more
  • Fri

    Mar 6

    67°Lo 48°

    Some sunshine

    Beneficial weather for migraines
    • Hi
      RealFeel
      72°
    • UV
      5 - Moderate
    • Cloud
      Cover
      45%
  • Sat

    Mar 7

    72°Lo 51°

    Sun and areas of high clouds

    Beneficial weather for migraines
    • Hi
      RealFeel
      75°
    • UV
      4 - Moderate
    • Cloud
      Cover
      82%
    more
  • Sun

    Mar 8

    72°Lo 52°

    Clouds giving way to some sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      77°
    • UV
      5 - Moderate
    • Cloud
      Cover
      47%
    more
  • Mon

    Mar 9

    69°Lo 53°

    Sunny

    Beneficial weather for migraines
    • Hi
      RealFeel
      77°
    • UV
      5 - Moderate
    • Cloud
      Cover
      13%
    more
Next Previous
Hi 67° RealFeel® 72° Precipitation 6%

Day

N

E

S

W

  • N 5 mph
  • Gusts: 9 mph

Some sunshine

  • Max UV Index: 5 (Moderate)
  • Thunderstorms: 1%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 48° RealFeel® 49° Precipitation 4%

Night

N

E

S

W

  • NNW 4 mph
  • Gusts: 8 mph

Cloudy most of the time

  • Max UV Index: N/A
  • Thunderstorms: 1%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Mar 6

more Historical Weather Data >
  Today Normal Record 3/6/2014
High 67° N/A N/A 63°
Low 48° N/A N/A 56°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:33 AM with 11:34 of sunlight, then sets at 6:07 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 7:18 PM with 12:06 of moolight, then sets at 7:24 AM

Castro Valley Weather Report

Western Storm to Deliver Fraction of Much-Needed Rain, Snow

February 28, 2015; 8:13 AM ET

A slow-moving storm will continue to affect the West this weekend and into the first part of next week with rounds of precipitation for some needy areas as well as trouble for travelers. more >

Making a Forecast: The Sixth Sense

Feb 16, 2015; 5:00 AM ET What steps go into making a forecast?