2025 Compare Cities Climate:
Castro Valley, CA vs St. Helena, CA

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Highlights
- St. Helena has 74.2% more rainy days than Castro Valley.
- St. Helena has 0.8% more Sunny Days than Castro Valley.
- On the BestPlaces comfort index, St. Helena scores 3.5% worse than Castro Valley
 Castro Valley, CASt. Helena, CAUnited States
 Rainfall  Unlock3738
 Snowfall0  Unlock28
 Precipitation  Unlock71106
 Sunny261  Unlock205
 Avg. July High  Unlock8986
 Avg. Jan. Low42  Unlock22
 Comfort Index (higher=better)  Unlock8.37
 UV Index5.4  Unlock4.3
 Elevation  Unlock2532443
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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Reviews for St. Helena    2 Reviews

Over 4 years ago

There is no better place to raise a family. Great community, excellent resources, fabulous restaurants, amazing hikes and beautiful scenery.  More

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Over 19 years ago

I currently live in Sacramento, California for about 5 months and returning to batavia, New York in 5 more months. My boyfriend and I are going to get a place together  More

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