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National Weather Service Forecast for: Castro Valley, CA


Issued by: National Weather Service San Francisco Bay Area/Monterey, CA
Updated: Mon, 30-Jun-2025 2:47pm PDT

Castro Valley/Hayward
 
  Tuesday

Tuesday: Mostly Sunny
Mostly Sunny
Wednesday

Wednesday: Mostly Sunny
Mostly Sunny
Thursday

Thursday: Mostly Sunny
Mostly Sunny
Independence
Day
Independence Day: Mostly Sunny
Mostly Sunny
Saturday

Saturday: Mostly Sunny
Mostly Sunny
Sunday

Sunday: Mostly Sunny
Mostly Sunny
Monday

Monday: Mostly Sunny
Mostly Sunny
  Hi 78 °F Hi 77 °F Hi 73 °F Hi 68 °F Hi 73 °F Hi 74 °F Hi 72 °F
 
Tonight

Tonight: Mostly Cloudy
Mostly Cloudy
Tuesday
Night
Tuesday Night: Partly Cloudy
Partly Cloudy
Wednesday
Night
Wednesday Night: Mostly Clear
Mostly Clear
Thursday
Night
Thursday Night: Partly Cloudy
Partly Cloudy
Friday
Night
Friday Night: Partly Cloudy
Partly Cloudy
Saturday
Night
Saturday Night: Partly Cloudy
Partly Cloudy
Sunday
Night
Sunday Night: Partly Cloudy
Partly Cloudy
 
Lo 56 °F Lo 57 °F Lo 56 °F Lo 54 °F Lo 54 °F Lo 54 °F Lo 55 °F  

 

Tonight
 
Mostly cloudy, with a low around 56. West northwest wind around 6 mph.
Tuesday
 
Mostly sunny. High near 78, with temperatures falling to around 75 in the afternoon. West wind 3 to 10 mph.
Tuesday Night
 
Partly cloudy, with a low around 57. West wind 5 to 9 mph.
Wednesday
 
Mostly sunny, with a high near 77. West southwest wind 5 to 10 mph.
Wednesday Night
 
Mostly clear, with a low around 56. West southwest wind 6 to 10 mph.
Thursday
 
Mostly sunny, with a high near 73.
Thursday Night
 
Partly cloudy, with a low around 54.
Independence Day
 
Mostly sunny, with a high near 68.
Friday Night
 
Partly cloudy, with a low around 54.
Saturday
 
Mostly sunny, with a high near 73.
Saturday Night
 
Partly cloudy, with a low around 54.
Sunday
 
Mostly sunny, with a high near 74.
Sunday Night
 
Partly cloudy, with a low around 55.
Monday
 
Mostly sunny, with a high near 72.

 

Forecast from NOAA-NWS for Castro Valley, CA.

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