• Tonight

    Sep 2

    Lo 59°

    Increasing cloudiness

    Driving Weather
    • Precip
      2%
    • Hours of Precip
      0
    • Rain
      0 in
    more
  • Thu

    Sep 3

    72°Lo 58°

    Low clouds, then sunshine

    Excellent for driving
    • Precip
      3%
    • Hours of Precip
      0
    • Rain
      0 in
    more
  • Fri

    Sep 4

    71°Lo 54°

    Areas of low clouds, then sun

    Excellent for driving
    • Precip
      8%
    • Hours of Precip
      0
    • Rain
      0 in
  • Sat

    Sep 5

    77°Lo 55°

    Low clouds, then sunshine

    Excellent for driving
    • Precip
      5%
    • Hours of Precip
      0
    • Rain
      0 in
    more
  • Sun

    Sep 6

    84°Lo 55°

    Plenty of sun

    Excellent for driving
    • Precip
      1%
    • Hours of Precip
      0
    • Rain
      0 in
    more
Next Previous
Mainly clear 63° Lo 59° RealFeel® 58° / 56°

N

E

S

W

  • Precipitation: 6%
  • Rain: 0 in
  • Snow: 0 in
  • Humidity: 80%
  • Cloud Cover: 11%
  • Dew Point: 55° F
  • Visibility: 10 mi
12 mph

Temperature History - Sep 4

more Historical Weather Data >
  Today Normal Record 9/4/2014
High 71° N/A N/A 74°
Low 54° N/A N/A 57°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:41 AM with 12:52 of sunlight, then sets at 7:33 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 11:58 PM with 14:22 of moolight, then sets at 2:20 PM

Castro Valley Weather Report

San Francisco: Sunny Skies, Pleasant Conditions to Last Into Labor Day Weekend

September 2, 2015; 3:20 PM ET

Sunny skies and seasonable conditions will follow low clouds each day through Saturday in the Bay Area. more >

Travel Weather Forecast

Sep 02, 2015; 6:30 PM ET United States travel weather forecast

Fri. Driving Weather