• Today

    May 5

    66°Lo 54°

    Variable clouds, a t-storm

    Beneficial weather for migraines
    • Hi
      RealFeel
      68°
    • UV
      4 - Moderate
    • Cloud
      Cover
      85%
    more
  • Fri

    May 6

    66°Lo 52°

    Clouds and sun with a t-storm

    Beneficial weather for migraines
    • Hi
      RealFeel
      69°
    • UV
      4 - Moderate
    • Cloud
      Cover
      63%
    more
  • Sat

    May 7

    68°Lo 53°

    Times of clouds and sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      72°
    • UV
      4 - Moderate
    • Cloud
      Cover
      70%
  • Sun

    May 8

    70°Lo 53°

    Partly sunny

    Beneficial weather for migraines
    • Hi
      RealFeel
      75°
    • UV
      7 - Very High
    • Cloud
      Cover
      45%
    more
  • Mon

    May 9

    71°Lo 50°

    Areas of low clouds, then sun

    Beneficial weather for migraines
    • Hi
      RealFeel
      77°
    • UV
      7 - Very High
    • Cloud
      Cover
      48%
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sat
5pm
6pm 7pm 8pm 9pm 10pm 11pm Sun
12am
  5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
Forecast
Partly Cloudy
Partly Cloudy
Partly Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Cloudy
Temp (°F) 65° 64° 63° 61° 59° 59° 58° 58°
RealFeel® 65° 64° 62° 60° 59° 58° 59° 58°
Humidity 65% 65% 66% 67% 69% 74% 75% 76%
   
  5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
Rain
 
7%
 
7%
 
7%
 
7%
 
7%
 
7%
 
7%
 
7%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  5pm 6pm 7pm 8pm 9pm 10pm 11pm 12am
Wind (mph) 7 W 6 W 6 WSW 6 WSW 5 WSW 5 WSW 4 SW 4 SW
UV Index 2 1 0 0 0 0 0 0
Cloud Cover 70% 70% 70% 95% 95% 95% 95% 95%
Dew Point 53° 52° 51° 50° 49° 50° 51° 50°
Middle Grid line 70 F Middle Grid line 65 F Middle Grid line 60 F Middle Grid line 55 F

Temperature History - May 7

more Historical Weather Data >
  Today Normal Record 5/7/2015
High 68° 70° N/A 59°
Low 53° 50° N/A 48°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:05 AM with 14:00 of sunlight, then sets at 8:05 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 7:06 AM with 14:15 of moolight, then sets at 9:21 PM

Castro Valley Weather Report

San Francisco: Rain showers may dampen the Bay Area into weekend

May 5, 2016; 4:35 AM ET

While it will not be an all-day washout into Saturday morning, any developing thunderstorm could produce locally heavy rainfall and raise the risk for flash flooding and mudslides. more >

Sat. Migraine Headache

Sat. UV Index