2026 Compare Cities Climate:
Sammamish, WA vs Castro Valley, CA

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Highlights
- Castro Valley has 59.6% less rainy days than Sammamish.
- Castro Valley has 68.4% more Sunny Days than Sammamish.
- On the BestPlaces comfort index, Castro Valley scores 21.1% better than Sammamish
 Sammamish, WACastro Valley, CAUnited States
 Rainfall  Unlock2138
 Snowfall6  Unlock28
 Precipitation  Unlock66106
 Sunny155  Unlock205
 Avg. July High  Unlock7686
 Avg. Jan. Low35  Unlock22
 Comfort Index (higher=better)  Unlock8.67
 UV Index2.6  Unlock4.3
 Elevation  Unlock1612443
Reviews for Sammamish    4 Reviews

Over 11 years ago

Seattle has beautiful greenery and gorgeous mountain views. It is quite dark and gloomy for much of the late fall into spring...or July 5th as locals know quite well. I  More

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Housing seems to be very overpriced, however after all things considered, it is well worth it. (Family of  More

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Sammamish is honestly a wonderful place to live. It's perfect for a family who wants a comfortable entertaining suburban life. The schools are pretty great, as I can say  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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