2026 Compare Cities Climate:
Summerlin South, NV vs Castro Valley, CA

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Highlights
- Castro Valley has 317.6% more rainy days than Summerlin South.
- Castro Valley has 10.6% less Sunny Days than Summerlin South.
- On the BestPlaces comfort index, Castro Valley scores 14.7% better than Summerlin South
 Summerlin South, NVCastro Valley, CAUnited States
 Rainfall  Unlock2138
 Snowfall1  Unlock28
 Precipitation  Unlock66106
 Sunny292  Unlock205
 Avg. July High  Unlock7686
 Avg. Jan. Low35  Unlock22
 Comfort Index (higher=better)  Unlock8.67
 UV Index5.8  Unlock4.3
 Elevation  Unlock1612443
Reviews for Summerlin South    2 Reviews

Over 4 years ago

This place is incredible. Clean, modern and only trending up. Cooler than most of Las Vegas. They take care of this area and it has everything you could want. More  More

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Over 15 years ago

Las Vegas has great weather 9 months a year,great p;ace for retirement.No state income taxes.Plenty to do here. I was born and raised near Pittsburg,Pa.,went to school  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 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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