2026 Compare Cities Climate:
Garden Grove, CA vs Castro Valley, CA

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Highlights
- Castro Valley has 60.2% more rainy days than Garden Grove.
- Castro Valley has 5.1% less Sunny Days than Garden Grove.
- On the BestPlaces comfort index, Castro Valley scores 7.5% worse than Garden Grove
 Garden Grove, CACastro Valley, CAUnited States
 Rainfall  Unlock2138
 Snowfall0  Unlock28
 Precipitation  Unlock66106
 Sunny275  Unlock205
 Avg. July High  Unlock7686
 Avg. Jan. Low46  Unlock22
 Comfort Index (higher=better)  Unlock8.67
 UV Index5.9  Unlock4.3
 Elevation  Unlock1612443
Reviews for Garden Grove    10 Reviews

I've lived here for over 20 years. City hasn't changed much. Being in the SoCal area, there's plenty of stuff to do around here. Like with all of SoCal, population has  More

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Over 9 years ago

So safe and boring that the police here rarely have anything better to do. At one time, I rented a room in another person's home and decided to put some aluminum foil  More

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Over 14 years ago

This is a very informative  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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