2026 Compare Cities :
Petaluma, CA vs Castro Valley, CA

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 Petaluma, CACastro Valley, CAUnited States
 Rainfall  Unlock21.338.1
 Snowfall0  Unlock27.8
 Precipitation Days74.866106.2
 Sunny260  Unlock205
 Avg. July High  Unlock75.685.8
 Avg. Jan. Low38.7  Unlock21.7
 Comfort Index (higher=better)  Unlock8.67
 UV Index4.9  Unlock4.3
 Elevation ft.301612443
Reviews for Petaluma    16 Reviews

I agree with the low star reviews. Been here for 25 years, raised a family and seen everything turn to the left and worse. Weather is glorious, love the old Victorians  More

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We’ve lived here for 3 years and we love it. It has taken some time to grow on us. We moved from SF where we had lived over 15 years, we were not used to one year leases  More

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I’ve lived here a couple of years (after living in others parts of the Bay Area for 15+ years) and I love it! Great neighborhoods, friendly folks, good schools with  More

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Reviews for Castro Valley    7 Reviews

CURMUDGEON - THANK YOU for your post. The most important part of your comment is your second paragraph. "Hodge-Podge" is the correct word for a lot of Castro  More

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Over 12 years ago

Kind of rural but close to Oakland and San  More

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Castro Valley is the largest unincorporated "city" in the Bay Area. Over the years, several attempts have been made to incorporate, but they have all been defeated at  More

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