• Tonight

    Sep 16

    Lo 60°

    Clear to partly cloudy

    Driving Weather
    • Precip
      1%
    • Hours of Precip
      0
    • Rain
      0 in
    more
  • Wed

    Sep 17

    77°Lo 65°

    Sunny to partly cloudy

    Excellent for driving
    • Precip
      24%
    • Hours of Precip
      0
    • Rain
      0 in
  • Thu

    Sep 18

    77°Lo 64°

    Partly sunny

    Excellent for driving
    • Precip
      25%
    • Hours of Precip
      0
    • Rain
      0 in
    more
  • Fri

    Sep 19

    77°Lo 61°

    Mostly sunny and pleasant

    Excellent for driving
    • Precip
      0%
    • Hours of Precip
      0
    • Rain
      0 in
    more
  • Sat

    Sep 20

    79°Lo 61°

    Plenty of sunshine

    Excellent for driving
    • Precip
      1%
    • Hours of Precip
      0
    • Rain
      0 in
    more
Next Previous
Hi 77° RealFeel® 77° Precipitation 24%

Day

N

E

S

W

  • W 8 mph
  • Gusts: 13 mph

Sunny to partly cloudy

  • Max UV Index: 6 (High)
  • Thunderstorms: 14%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs
Lo 65° RealFeel® 61° Precipitation 25%

Night

N

E

S

W

  • SW 6 mph
  • Gusts: 10 mph

Partly cloudy

  • Max UV Index: N/A
  • Thunderstorms: 8%
  • Precipitation: 0 in
  • Rain: 0 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 0 hrs
  • Hours of Rain: 0 hrs

Temperature History - Sep 17

more Historical Weather Data >
  Today Normal Record 9/17/2013
High 77° N/A N/A 71°
Low 65° N/A N/A 58°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:52 AM with 12:21 of sunlight, then sets at 7:13 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:01 AM with 14:21 of moolight, then sets at 3:22 PM

Top Story

Castro Valley Weather Report

San Francisco: Sunshine, Seasonable Temperatures to Continue

September 16, 2014; 9:02 PM ET

The Bay Area will continue to feature sunshine and seasonable temperatures as the summer season comes to a close. more >

Travel Weather Forecast

Sep 17, 2014; 12:10 AM ET United States travel weather forecast

Wed. Travel Weather

48 Hour Precipitation Forecast

Wed. Driving Weather