• Early AM

    Sep 5

    Lo 53°

    Partly cloudy

    Stargazing Weather
    • Cloud
      Cover
      46%
    • Precip
      2%
    • Hours of Precip
      0
    more
  • Today

    Sep 5

    80°Lo 54°

    Mostly sunny

    Excellent for stargazing
    • Cloud
      Cover
      11%
    • Precip
      1%
    • Hours of Precip
      0
  • Sun

    Sep 6

    85°Lo 56°

    Plenty of sun

    Excellent for stargazing
    • Cloud
      Cover
      2%
    • Precip
      1%
    • Hours of Precip
      0
    more
  • Mon

    Sep 7

    88°Lo 57°

    Plenty of sunshine

    Excellent for stargazing
    • Cloud
      Cover
      1%
    • Precip
      0%
    • Hours of Precip
      0
    more
  • Tue

    Sep 8

    88°Lo 58°

    Areas of low clouds, then sun

    Excellent for stargazing
    • Cloud
      Cover
      4%
    • Precip
      1%
    • Hours of Precip
      0
    more
Next Previous
< Previous 8 hours Next 8 hours >
  Sat
4pm
5pm 6pm 7pm 8pm 9pm 10pm 11pm
  4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm
Forecast
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Sunny
Mostly Clear
Mostly Clear
Mostly Clear
Mostly Clear
Temp (°F) 80° 79° 77° 73° 69° 65° 64° 63°
RealFeel® 81° 78° 75° 70° 66° 63° 64° 63°
Humidity 34% 36% 39% 46% 51% 55% 61% 63%
   
  4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm
Rain
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Snow
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
Ice
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
 
0%
   
  4pm 5pm 6pm 7pm 8pm 9pm 10pm 11pm
Wind (mph) 10 NW 12 WNW 10 WNW 9 W 7 W 6 WSW 5 WSW 4 SW
UV Index 4 2 1 0 0 0 0 0
Cloud Cover 11% 11% 11% 11% 11% 11% 11% 11%
Dew Point 50° 50° 51° 51° 50° 49° 50° 50°
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 Middle Grid line 60 F

Temperature History - Sep 5

more Historical Weather Data >
  Today Normal Record 9/5/2014
High 80° N/A N/A 73°
Low 54° N/A N/A 59°

Solunar Information for Castro Valley, CA

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:42 AM with 12:50 of sunlight, then sets at 7:32 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 11:13 AM with 3:06 of moolight, then sets at 2:20 PM

Sat, Sep 5
Last
Sun, Sep 13
New
Mon, Sep 21
First
Mon, Sep 28
Full

Castro Valley Weather Report

San Francisco: Pleasant Stretch Continues Through Labor Day

September 5, 2015; 1:47 AM ET

As a ridge moves in from the west over the weekend and early next week, high temperatures will swing back above normal. more >

Curiosity Tastes Mars

Dec 14, 2012; 5:00 AM ET The Mars Science Laboratory Rover 'Curiosity' continues its sampling and analyzing of the Martian surface.

Sat. Stargazing