2025 Compare Cities Climate:
Campbell, CA vs Castro Valley, CA

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Highlights
- Castro Valley has 15.8% more rainy days than Campbell.
- Castro Valley has 2.4% more Sunny Days than Campbell.
- On the BestPlaces comfort index, Castro Valley scores 1.1% worse than Campbell
 Campbell, CACastro Valley, CAUnited States
 Rainfall  Unlock2138
 Snowfall0  Unlock28
 Precipitation  Unlock66106
 Sunny255  Unlock205
 Avg. July High  Unlock7686
 Avg. Jan. Low41  Unlock22
 Comfort Index (higher=better)  Unlock8.67
 UV Index5.1  Unlock4.3
 Elevation  Unlock1612443
Reviews for Campbell    3 Reviews

Great weather....lots of places to eat and things to see and do...a bedroom community next to San Jose, CA. Wonderful community involvement!!! Great place to raise  More

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Over 19 years ago

The marine air comes over the hills to cool this area even on the hottest  More

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There are some very nice neighborhoods in Campbell. ...although it is becoming a city. Housing prices are absurd. Crime is increasing, and the schools aren't great.   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 11 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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