Sunrise and Sunset times in Castro Valley, United States 
Today:
 Sunrise: 07:08:46
|
 Sunset: 16:49:24
|
Day Length: 9h 40m 38s
Time zone: America/Los_Angeles, UTC -8 h.
Latitude: 37.7092, Longitude: -122.063
Castro Valley
California, United States 
63 625 people
| Date | Sunrise | Solar Noon | Sunset | Day length |
|---|---|---|---|---|
| 2025-Dec-01, Monday | 07:05:09 | 11:57:29 | 16:49:49 | 9h 44m 40s |
| 2025-Dec-02, Tuesday | 07:06:05 | 11:57:52 | 16:49:40 | 9h 43m 35s |
| 2025-Dec-03, Wednesday | 07:07:00 | 11:58:16 | 16:49:32 | 9h 42m 32s |
| 2025-Dec-04, Thursday | 07:07:54 | 11:58:40 | 16:49:27 | 9h 41m 33s |
| 2025-Dec-05, Friday | 07:08:46 | 11:59:05 | 16:49:24 | 9h 40m 38s |
| 2025-Dec-06, Saturday | 07:09:38 | 11:59:31 | 16:49:23 | 9h 39m 45s |
| 2025-Dec-07, Sunday | 07:10:29 | 11:59:57 | 16:49:24 | 9h 38m 55s |
| 2025-Dec-08, Monday | 07:11:19 | 12:00:23 | 16:49:27 | 9h 38m 8s |
| 2025-Dec-09, Tuesday | 07:12:07 | 12:00:50 | 16:49:33 | 9h 37m 26s |
| 2025-Dec-10, Wednesday | 07:12:54 | 12:01:17 | 16:49:40 | 9h 36m 46s |
| 2025-Dec-11, Thursday | 07:13:40 | 12:01:45 | 16:49:49 | 9h 36m 9s |
| 2025-Dec-12, Friday | 07:14:25 | 12:02:13 | 16:50:01 | 9h 35m 36s |
| 2025-Dec-13, Saturday | 07:15:08 | 12:02:41 | 16:50:15 | 9h 35m 7s |
| 2025-Dec-14, Sunday | 07:15:49 | 12:03:10 | 16:50:30 | 9h 34m 41s |
| 2025-Dec-15, Monday | 07:16:30 | 12:03:39 | 16:50:48 | 9h 34m 18s |
| 2025-Dec-16, Tuesday | 07:17:08 | 12:04:08 | 16:51:08 | 9h 34m 0s |
| 2025-Dec-17, Wednesday | 07:17:45 | 12:04:37 | 16:51:29 | 9h 33m 44s |
| 2025-Dec-18, Thursday | 07:18:21 | 12:05:07 | 16:51:53 | 9h 33m 32s |
| 2025-Dec-19, Friday | 07:18:54 | 12:05:36 | 16:52:18 | 9h 33m 24s |
| 2025-Dec-20, Saturday | 07:19:27 | 12:06:06 | 16:52:46 | 9h 33m 19s |
| 2025-Dec-21, Sunday | 07:19:57 | 12:06:36 | 16:53:15 | 9h 33m 18s |
| 2025-Dec-22, Monday | 07:20:25 | 12:07:06 | 16:53:46 | 9h 33m 21s |
| 2025-Dec-23, Tuesday | 07:20:52 | 12:07:36 | 16:54:19 | 9h 33m 27s |
| 2025-Dec-24, Wednesday | 07:21:17 | 12:08:06 | 16:54:54 | 9h 33m 37s |
| 2025-Dec-25, Thursday | 07:21:40 | 12:08:35 | 16:55:30 | 9h 33m 50s |
| 2025-Dec-26, Friday | 07:22:01 | 12:09:05 | 16:56:09 | 9h 34m 8s |
| 2025-Dec-27, Saturday | 07:22:20 | 12:09:34 | 16:56:48 | 9h 34m 28s |
| 2025-Dec-28, Sunday | 07:22:38 | 12:10:04 | 16:57:30 | 9h 34m 52s |
| 2025-Dec-29, Monday | 07:22:53 | 12:10:33 | 16:58:12 | 9h 35m 19s |
| 2025-Dec-30, Tuesday | 07:23:06 | 12:11:02 | 16:58:57 | 9h 35m 51s |
| 2025-Dec-31, Wednesday | 07:23:17 | 12:11:30 | 16:59:43 | 9h 36m 26s |
Day length in Castro Valley during the year on the chart:
Castro Valley on United States map:
Locations in the same time zone America/Los_Angeles
Los Angeles (California), Seattle (Washington), San Francisco (California), San Diego (California), Riverside (California), Las Vegas (Nevada), Portland (Oregon), Sacramento (California), San Jose (California), Fresno (California), Concord (California), Mission Viejo (California), Bakersfield (California), Murrieta (California), Long Beach (California), Reno (Nevada), Oakland (California), Indio (California), Spokane (Washington), Stockton (California), Oxnard (California), Modesto (California), Anaheim (California), Lancaster (California), Victorville (California), Santa Ana (California), Santa Rosa (California), Santa Clarita (California), Antioch (California), Henderson (Nevada)
Largest populated areas in United States
New York (New York), Los Angeles (California), Chicago (Illinois), Miami (Florida), Dallas (Texas), Philadelphia (Pennsylvania), Houston (Texas), Washington (District of Columbia), Atlanta (Georgia), Boston (Massachusetts), Phoenix (Arizona), Seattle (Washington), San Francisco (California), Detroit (Michigan), San Diego (California), Minneapolis (Minnesota), Tampa (Florida), Denver (Colorado), Brooklyn (New York), Queens (New York), Baltimore (Maryland), Riverside (California), St. Louis (Missouri), Las Vegas (Nevada), Portland (Oregon), San Antonio (Texas), Sacramento (California), San Jose (California), Orlando (Florida), Cleveland (Ohio)
Countries closest to United States
*Calculation of distances from capital to capital
Daylight Hours FAQ: 10 Most Googled Questions Answered
Daylight hours refer to the period between sunrise and sunset. This duration changes throughout the year based on season and geographic location.
Earth's 23.5° axial tilt causes uneven sunlight distribution. Your hemisphere receives less direct sunlight in winter (shorter days) and more in summer (longer days).
Northern Hemisphere: June 20-22 (summer solstice).
Southern Hemisphere: December 21-23.
Near polar circles, the sun doesn't set for 24 hours.
Northern Hemisphere: December 21-22 (winter solstice).
Southern Hemisphere: June 20-21.
The closer to poles, the more extreme variations:
- Equator: ~12-hour days year-round
- Polar regions: Midnight sun/polar nights occur
Miami's lower latitude means:
- Winter days are longer than NY's
- Summer days are slightly shorter
During equinoxes:
- Spring: March 20-21
- Fall: September 22-23
Most rapid change near equinoxes: 2-4 minutes daily.
Slowest change near solstices: <1 minute daily.
Reliable tools:
- Timeanddate.com
- SunCalc.org
- Photographer's Ephemeris app
Yes. Reduced winter sunlight may cause:
- Seasonal Affective Disorder (SAD)
- Vitamin D deficiency
Solution: Light therapy lamps & midday walks