2026 Compare Cities Climate:
Decatur, IL vs Castro Valley, CA

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Highlights
- Castro Valley has 46.1% less rainy days than Decatur.
- Castro Valley has 31.2% more Sunny Days than Decatur.
- On the BestPlaces comfort index, Castro Valley scores 19.4% better than Decatur
 Decatur, ILCastro Valley, CAUnited States
 Rainfall  Unlock2138
 Snowfall13  Unlock28
 Precipitation  Unlock66106
 Sunny199  Unlock205
 Avg. July High  Unlock7686
 Avg. Jan. Low19  Unlock22
 Comfort Index (higher=better)  Unlock8.67
 UV Index3.9  Unlock4.3
 Elevation  Unlock1612443
Reviews for Decatur    14 Reviews

I was sent here by the company I worked for in the '90's and was not initially impressed with midwest living. However, over the years I got used to living in the "Pride  More

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I grew up in Decatur and I still have family there, but it depresses me to see what it has become. It has a high unemployment rate, many business have closed or are run  More

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Over 15 years ago

If you enjoy drinking & driving, Decatur's fifteen drive-thru liquor windows, three times the # of drive-thru's than the ten largest cities in Illinois, COMBINED, will  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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