2026 Compare Cities Climate:
Tracy, CA vs Castro Valley, CA

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Highlights
- Castro Valley has 57.8% more rainy days than Tracy.
- Castro Valley has 1.1% less Sunny Days than Tracy.
- On the BestPlaces comfort index, Castro Valley scores 3.6% better than Tracy
 Tracy, CACastro Valley, CAUnited States
 Rainfall  Unlock2138
 Snowfall0  Unlock28
 Precipitation  Unlock66106
 Sunny264  Unlock205
 Avg. July High  Unlock7686
 Avg. Jan. Low38  Unlock22
 Comfort Index (higher=better)  Unlock8.67
 UV Index5  Unlock4.3
 Elevation  Unlock1612443
Reviews for Tracy    18 Reviews

Native born and raised in Tracy. I've seen it go from a small community of 12,000 to almost 100,000 in 50 years. The growth has not been for the better IMO. It has  More

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I was raised in Tracy and over the last 60+ years, it has gone from a small town of about 9,000 to almost 100,000. The changes have not all been good. It was a good  More

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I have been living here for 4 years and I can’t wait to move out of here. Tracy is a place very very very dusty.. it can be just one week and you have to wipe out  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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