2026 Compare Cities Climate:
Castro Valley, CA vs New River, AZ

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Highlights
- New River has 36.2% less rainy days than Castro Valley.
- New River has 13.4% more Sunny Days than Castro Valley.
- On the BestPlaces comfort index, New River scores 12.8% worse than Castro Valley
 Castro Valley, CANew River, AZUnited States
 Rainfall  Unlock1438
 Snowfall0  Unlock28
 Precipitation  Unlock38106
 Sunny261  Unlock205
 Avg. July High  Unlock10386
 Avg. Jan. Low42  Unlock22
 Comfort Index (higher=better)  Unlock7.57
 UV Index5.4  Unlock4.3
 Elevation  Unlock20142443
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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Reviews for New River    3 Reviews

Over 9 years ago

Air quality should be the most important part of where you decide to live. New River is smog  More

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As New River resident and RealtorĀ® for 14 years there are many reasons why I love calling New River home: the fresh air, the mountain views, the wildlife, the starry  More

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Over 13 years ago

thinking of moving and retiring in New River from  More

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