2026 Compare Cities Climate:
San Rafael, CA vs Castro Valley, CA

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Highlights
- Castro Valley has 47.5% less rainy days than San Rafael.
- Castro Valley has 2.0% more Sunny Days than San Rafael.
- On the BestPlaces comfort index, Castro Valley scores 1.2% better than San Rafael
 San Rafael, CACastro Valley, CAUnited States
 Rainfall  Unlock2138
 Snowfall0  Unlock28
 Precipitation  Unlock66106
 Sunny256  Unlock205
 Avg. July High  Unlock7686
 Avg. Jan. Low42  Unlock22
 Comfort Index (higher=better)  Unlock8.67
 UV Index5.2  Unlock4.3
 Elevation  Unlock1612443
Reviews for San Rafael    7 Reviews

Over 14 years ago

San Rafael is only 30 minutes from downtown San Francisco, but the weather is completely different. It's sunny most of the year, including in the summer when the city  More

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Over 16 years ago

I feal very safe in this town. I think getting stopped for talking on your cell phone while driving is a big deal here. Thats about all I can  More

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Over 18 years ago

Cost of living too high. Unfriendly  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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