2025 Compare Cities Climate:
Naperville, IL vs Castro Valley, CA

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Highlights
- Castro Valley has 44.8% less rainy days than Naperville.
- Castro Valley has 38.1% more Sunny Days than Naperville.
- On the BestPlaces comfort index, Castro Valley scores 24.6% better than Naperville
 Naperville, ILCastro Valley, CAUnited States
 Rainfall  Unlock2138
 Snowfall29  Unlock28
 Precipitation  Unlock66106
 Sunny189  Unlock205
 Avg. July High  Unlock7686
 Avg. Jan. Low15  Unlock22
 Comfort Index (higher=better)  Unlock8.67
 UV Index3.4  Unlock4.3
 Elevation  Unlock1612443
Reviews for Naperville    26 Reviews

Naperville has a lot to offer. The schools are top notch, it is close to Chicago with a commuter rail that is easily accessible and fast, there are lots of parks and  More

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Over 3 years ago

Lived around the area my whole life, moved to the downtown Naperville 7 years ago and wow has it changed and not for the better. There is way too much traffic and no  More

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Over 7 years ago

Went with my real estate agent to check out a few houses in Naperville.First impression was the town was adorable especially the downtown but way too many people.couldnt  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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