• Today

    Apr 26

    68°Lo 55°

    Sunshine

    Very Good for an outdoor bbq
    • Precip
      0%
    • Hi
      RealFeel
      73°
    • Wind
      Gust
      20 mph
  • Mon

    Apr 27

    81°Lo 55°

    Sunny and warmer

    Excellent for an outdoor bbq
    • Precip
      0%
    • Hi
      RealFeel
      87°
    • Wind
      Gust
      17 mph
    more
  • Tue

    Apr 28

    70°Lo 54°

    Mostly sunny and nice

    Excellent for an outdoor bbq
    • Precip
      0%
    • Hi
      RealFeel
      76°
    • Wind
      Gust
      17 mph
    more
  • Wed

    Apr 29

    73°Lo 55°

    Mostly sunny

    Excellent for an outdoor bbq
    • Precip
      3%
    • Hi
      RealFeel
      80°
    • Wind
      Gust
      14 mph
    more
  • Thu

    Apr 30

    82°Lo 57°

    Mostly sunny and nice

    Excellent for an outdoor bbq
    • Precip
      1%
    • Hi
      RealFeel
      86°
    • Wind
      Gust
      15 mph
    more
Next Previous
Next 8 hours >
  Sun
12am
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  12am 1am 2am 3am 4am 5am 6am 7am
Forecast
Cloudy
Cloudy
Mostly Cloudy
Cloudy
Cloudy
Cloudy
Partly Cloudy
Partly Sunny
Temp (°F) 52° 52° 51° 49° 48° 49° 49° 50°
RealFeel® 47° 47° 46° 46° 46° 48° 49° 52°
Humidity 73% 75% 77% 78% 78% 77% 77% 76%
   
  12am 1am 2am 3am 4am 5am 6am 7am
Rain
 
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Snow
 
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Ice
 
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  12am 1am 2am 3am 4am 5am 6am 7am
Wind (mph) 10 W 9 WSW 9 W 7 NW 6 WNW 5 WNW 5 WNW 2 W
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 64% 54% 77% 73% 63% 53% 44% 35%
Dew Point 44° 44° 44° 43° 42° 42° 42° 43°
Middle Grid line 55 F Middle Grid line 50 F Middle Grid line 45 F

Temperature History - Apr 26

more Historical Weather Data >
  Today Normal Record 4/26/2014
High 68° N/A N/A 59°
Low 55° N/A N/A 42°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:19 AM with 13:35 of sunlight, then sets at 7:54 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:21 PM with 13:33 of moolight, then sets at 2:54 AM

Castro Valley Weather Report

San Francisco: Dry Pattern to Continue After Weekend Showers

April 26, 2015; 12:41 PM ET

Warm and dry conditions will begin the new week in San Francisco. more >

Is Your Outdoor Gear Waterproof?

Dec 5, 2012; 5:00 AM ET Now that it's cold enough to hit the slopes, you may want to look more closely at what materials your winter sports gear is made of. As it turns out, not all waterproofing is created equal.

Sun. Outdoor Entertaining

Sun. Wind Maps

Sun. UV Index