2026 Compare Cities Climate:
Castro Valley, CA vs Suisun City, CA

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Highlights
- Suisun City has 17.4% more rainy days than Castro Valley.
- Suisun City has 1.1% more Sunny Days than Castro Valley.
- On the BestPlaces comfort index, Suisun City scores 4.7% worse than Castro Valley
 Castro Valley, CASuisun City, CAUnited States
 Rainfall  Unlock2538
 Snowfall0  Unlock28
 Precipitation  Unlock64106
 Sunny261  Unlock205
 Avg. July High  Unlock9286
 Avg. Jan. Low42  Unlock22
 Comfort Index (higher=better)  Unlock8.27
 UV Index5.4  Unlock4.3
 Elevation  Unlock72443
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 Suisun City    0 Reviews

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