• Today

    Apr 18

    73°Lo 49°

    Sunny to partly cloudy

    Beneficial weather for migraines
    • Hi
      RealFeel
      78°
    • UV
      8 - Very High
    • Cloud
      Cover
      30%
  • Sun

    Apr 19

    72°Lo 50°

    Low clouds break for some sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      76°
    • UV
      7 - High
    • Cloud
      Cover
      61%
    more
  • Mon

    Apr 20

    69°Lo 51°

    Partly sunny

    Beneficial weather for migraines
    • Hi
      RealFeel
      72°
    • UV
      7 - High
    • Cloud
      Cover
      41%
    more
  • Tue

    Apr 21

    62°Lo 50°

    Partly sunny and breezy

    Beneficial weather for migraines
    • Hi
      RealFeel
      63°
    • UV
      7 - High
    • Cloud
      Cover
      45%
    more
  • Wed

    Apr 22

    70°Lo 48°

    A couple of showers possible

    At Risk weather for migraines
    • Hi
      RealFeel
      71°
    • UV
      6 - High
    • Cloud
      Cover
      66%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sun
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Forecast
Cloudy
Mostly Cloudy
Cloudy
Cloudy
Partly Sunny
Cloudy
Cloudy
Cloudy
Temp (°F) 52° 51° 50° 49° 50° 53° 56° 59°
RealFeel® 50° 49° 50° 49° 51° 54° 60° 66°
Humidity 86% 88% 89% 90% 88% 87% 80% 73%
   
  3am 4am 5am 6am 7am 8am 9am 10am
Rain
 
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Snow
 
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Ice
 
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  3am 4am 5am 6am 7am 8am 9am 10am
Wind (mph) 6 NW 5 NW 5 NW 5 NW 4 WNW 4 WNW 4 WNW 4 WNW
UV Index 0 0 0 0 0 0 1 3
Cloud Cover 98% 81% 64% 50% 38% 100% 97% 95%
Dew Point 48° 47° 47° 47° 47° 49° 50° 50°
Middle Grid line 60 F Middle Grid line 55 F Middle Grid line 50 F Middle Grid line 45 F

Temperature History - Apr 18

more Historical Weather Data >
  Today Normal Record 4/19/2014
High 73° N/A N/A 61°
Low 49° N/A N/A 46°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:28 AM with 13:20 of sunlight, then sets at 7:48 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 7:15 AM with 13:54 of moolight, then sets at 9:09 PM

Castro Valley Weather Report

San Francisco: Pleasant Conditions to Continue This Week

April 19, 2015; 6:03 AM ET

The Bay Area will see pleasant conditions hold this week with plenty of sunshine and comfortable temperatures. more >

Sat. Migraine Headache

Sat. UV Index