• Tonight

    Jul 28

    Lo 56°

    Low clouds, fog forming

    Migraine Headache Weather
    • Hi
      RealFeel
      89°
    • UV
      7 - Very High
    • Cloud
      Cover
      31%
  • Fri

    Jul 29

    84°Lo 57°

    Clouds, then sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      88°
    • UV
      7 - Very High
    • Cloud
      Cover
      44%
    more
  • Sat

    Jul 30

    82°Lo 58°

    Mostly sunny

    Beneficial weather for migraines
    • Hi
      RealFeel
      85°
    • UV
      7 - Very High
    • Cloud
      Cover
      20%
    more
  • Sun

    Jul 31

    80°Lo 59°

    Clouds, then sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      84°
    • UV
      7 - Very High
    • Cloud
      Cover
      47%
    more
  • Mon

    Aug 1

    80°Lo 56°

    Areas of fog, then sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      84°
    • UV
      7 - Very High
    • Cloud
      Cover
      47%
    more
Next Previous
Next 8 hours >
  Thu
8pm
9pm 10pm 11pm Fri
12am
1am 2am 3am
  8pm 9pm 10pm 11pm 12am 1am 2am 3am
Forecast
Partly Sunny
Mostly Clear
Mostly Clear
Mostly Clear
Mostly Clear
Mostly Clear
Mostly Cloudy
Mostly Cloudy
Temp (°F) 69° 65° 63° 62° 61° 60° 59° 59°
RealFeel® 66° 62° 61° 60° 59° 59° 59° 58°
Humidity 59% 63% 72% 76% 78% 81% 83% 82%
   
  8pm 9pm 10pm 11pm 12am 1am 2am 3am
Rain
 
0%
 
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0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
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Ice
 
0%
 
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  8pm 9pm 10pm 11pm 12am 1am 2am 3am
Wind (mph) 12 WNW 9 WNW 8 W 6 W 6 WSW 5 WSW 5 WSW 5 WSW
UV Index 0 0 0 0 0 0 0 0
Cloud Cover 30% 13% 22% 25% 19% 13% 76% 76%
Dew Point 54° 53° 54° 54° 54° 54° 54° 53°
Middle Grid line 70 F Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F

Temperature History - Jul 28

more Historical Weather Data >
  Today Normal Record 7/28/2015
High 85° 77° N/A 91°
Low 56° 57° N/A 57°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:09 AM with 14:11 of sunlight, then sets at 8:20 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 1:31 AM with 14:05 of moolight, then sets at 3:36 PM

Castro Valley Weather Report

Oppressive heat to envelop western US as late-week highs soar 10 to 15 degrees Fahrenheit above average

July 28, 2016; 7:33 PM ET

Highs will run between 10 and 15 degrees Fahrenheit above average across much of the interior western United States into the upcoming weekend. more >

Thu. Migraine Headache

Thu. UV Index