2026 Compare Cities Climate:
San Marcos, TX vs Castro Valley, CA

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Highlights
- Castro Valley has 39.5% less rainy days than San Marcos.
- Castro Valley has 12.5% more Sunny Days than San Marcos.
- On the BestPlaces comfort index, Castro Valley scores 19.4% better than San Marcos
 San Marcos, TXCastro Valley, CAUnited States
 Rainfall  Unlock2138
 Snowfall0  Unlock28
 Precipitation  Unlock66106
 Sunny232  Unlock205
 Avg. July High  Unlock7686
 Avg. Jan. Low39  Unlock22
 Comfort Index (higher=better)  Unlock8.67
 UV Index6  Unlock4.3
 Elevation  Unlock1612443
Reviews for San Marcos    6 Reviews

An area with so much potential and existing natural beauty.Sadly bad urban planning is clearly obvious.Looks like fun for tens of thousands of students.However for the  More

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Over 17 years ago

San Marcos has the most beautiful people and places that I have ever seen throughout my travels. I love this city so much that I decided to settle down here and start a  More

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Over 18 years ago

I spent several summers and a couple winters in San Marcos during my formidable years and really have to tell those interested about what a nice town it is. The best  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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