Castro Valley, California Weather
No Watches or Warnings for Castro Valley
Issued: 2:08 am PST Dec 18, 2025 Latitude: 37.6940973 Longitude: -122.0863522 View on Google Maps
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| Morning Fog |
Rain |
Rain |
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Rain |
Current Conditions at
HAYWARD - (KHWD)
52°
Cloudy
Mist
as of 5:20 AM PST
Rel. Humidity: 100%
Dew Point: 52°F
Visibility: 2 1/2 Miles
Pressure: 30.14 in.
Flight Rule: LIFR
Cloud Level(s): Solid Overcast at 200ft
Current Conditions at
OAKLAND - (KOAK)
52°
Cloudy
as of 5:26 AM PST
Rel. Humidity: 93%
Dew Point: 50°F
Visibility: 10 Miles
Pressure: 30.15 in.
Flight Rule: IFR
Wind Data
5 MPH
030° Northeast
Cloud Level(s): Few at 100ft, Broken at 500ft, Solid Overcast at 900ft
Current Conditions at
LIVERMORE - (KLVK)
52°
Cloudy
Mist
as of 5:20 AM PST
Rel. Humidity: 100%
Dew Point: 52°F
Visibility: 2 1/2 Miles
Pressure: 30.13 in.
Flight Rule: IFR
Cloud Level(s): Solid Overcast at 600ft
Current Conditions at
SAN CARLOS - (KSQL)
50°
Cloudy
as of 5:15 AM PST
Rel. Humidity: 100%
Dew Point: 50°F
Visibility: 7 Miles
Pressure: 30.15 in.
Flight Rule: VFR
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Today... Patchy fog before 11am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 61. Light and variable wind. |
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Tonight... A 20 percent chance of rain after 10pm. Mostly cloudy, with a low around 50. Calm wind. |
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Friday... Rain, mainly after 10am. High near 62. South wind 6 to 9 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible. |
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Friday Night... Rain, mainly before 10pm. Low around 54. South wind 5 to 7 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible. |
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Saturday... Rain, mainly after 10am. High near 60. Calm wind becoming south southwest around 5 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible. |
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Saturday Night... Rain. Low around 55. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible. |
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Sunday... Rain. High near 62. Chance of precipitation is 90%. |
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Sunday Night... Rain. Cloudy, with a low around 54. |
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Monday... Rain. Cloudy, with a high near 59. |
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Monday Night... Rain likely. Cloudy, with a low around 49. |
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Tuesday... Rain likely. Cloudy, with a high near 58. |
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Tuesday Night... Rain. Mostly cloudy, with a low around 49. |
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Wednesday... Rain likely. Mostly cloudy, with a high near 58. |
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Current Radar Image
Sun Almanac for Castro Valley, California
Sunrise: 07:19 AM
Sunset: 4:52 PM
Civil Sunrise:06:49 AM
Civil Sunset: 5:21 PM
Nautical Sunrise: 06:16 AM
Nautical Sunset: 5:54 PM
Astro Sunrise: 05:44 AM
Astro Sunset: 6:26 PM
California's Current Temperatures
California's Satellite Image
California's Current Wind Direction
| National Summary |
of upper and lower values of current conditions amongst 7237 locations
in the contiguous United States |
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High
Temp |
77° |
Lantana/Palm Bea, Florida
and 2 other locations
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Low
Temp |
-4° |
Plentywood, Montana
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Wind
Speed |
54mph |
Rapid City, South Dakota
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Wind
Gust |
83mph |
Rapid City, South Dakota
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Wind
Chill |
-32° |
Robertson Field, North Dakota
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High
Pressure |
30.75Hg |
Charlie, Montana
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Low
Pressure |
29.03Hg |
Orr, Minnesota
and 2 other locations
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| # Locations Reporting Snow |
55 |
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| # Locations Reporting Rain |
155 |
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| # Locations Reporting Fog |
51 |
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| Average Temperature in the Contiguous USA |
42° |
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Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the
National Weather Service for official information.
