• Today

    Apr 20

    72°Lo 50°

    Partly sunny

    Excellent for driving
    • Precip
      2%
    • Hours of Precip
      0
    • Rain
      0 in
  • Mon

    Apr 21

    64°Lo 51°

    Times of sun and clouds

    Very Good for driving
    • Precip
      16%
    • Hours of Precip
      1.5
    • Rain
      0.03 in
    more
  • Tue

    Apr 22

    61°Lo 47°

    Mainly cloudy with a shower

    Very Good for driving
    • Precip
      55%
    • Hours of Precip
      1
    • Rain
      0.04 in
    more
  • Wed

    Apr 23

    64°Lo 52°

    Mostly sunny and cool

    Excellent for driving
    • Precip
      1%
    • Hours of Precip
      0
    • Rain
      0 in
    more
  • Thu

    Apr 24

    67°Lo 53°

    Times of clouds and sun

    Very Good for driving
    • Precip
      13%
    • Hours of Precip
      2.5
    • Rain
      0.05 in
    more
Next Previous
Hi 72° RealFeel® 75° Precipitation 2%

Day

N

E

S

W

  • W 7 mph
  • Gusts: 13 mph

Partly sunny

  • Max UV Index: 7 (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® 48° Precipitation 3%

Night

N

E

S

W

  • W 5 mph
  • Gusts: 9 mph

Partly cloudy

  • 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 - Apr 20

more Historical Weather Data >
  Today Normal Record 4/20/2013
High 72° N/A N/A 73°
Low 50° N/A N/A 50°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:27 AM with 13:21 of sunlight, then sets at 7:48 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 12:31 AM with 10:24 of moolight, then sets at 10:55 AM

Top Story

Castro Valley Weather Report

Chance of Rain in San Francisco on Tuesday

April 20, 2014; 4:09 AM ET

There hasn't been any measurable precipitation in San Francisco since April 4. more >

Travel Weather Forecast

Apr 20, 2014; 6:04 AM ET United States travel weather forecast

Sun. Travel Weather

48 Hour Precipitation Forecast

Sun. Driving Weather