• Today

    Jul 28

    85°Lo 56°

    Mostly sunny and very warm

    Beneficial weather for migraines
    • Hi
      RealFeel
      89°
    • UV
      7 - Very High
    • Cloud
      Cover
      20%
  • 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
1pm
2pm 3pm 4pm 5pm 6pm 7pm 8pm
  1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm
Forecast
Sunny
Sunny
Sunny
Sunny
Sunny
Sunny
Sunny
Mostly Sunny
Temp (°F) 81° 84° 85° 83° 81° 79° 75° 69°
RealFeel® 88° 89° 89° 85° 82° 77° 72° 66°
Humidity 46% 41% 39% 37% 40% 43% 51% 59%
   
  1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm
Rain
 
0%
 
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0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
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0%
Ice
 
0%
 
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  1pm 2pm 3pm 4pm 5pm 6pm 7pm 8pm
Wind (mph) 8 WNW 9 WNW 9 WNW 9 WNW 10 W 9 W 9 WSW 8 WSW
UV Index 8 8 7 5 3 1 0 0
Cloud Cover 9% 4% 7% 6% 3% 1% 1% 11%
Dew Point 59° 58° 57° 54° 55° 55° 56° 54°
Middle Grid line 90 F Middle Grid line 85 F Middle Grid line 80 F Middle Grid line 75 F Middle Grid line 70 F Middle Grid line 65 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; 2:20 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