2025 Compare Cities Climate:
Castaic, CA vs Boulder, CO

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Highlights
- Boulder has 1.6% less rainy days than Castaic.
- Boulder has 13.4% less Sunny Days than Castaic.
- On the BestPlaces comfort index, Boulder scores 20.2% worse than Castaic
 Castaic, CABoulder, COUnited States
 Rainfall  Unlock1838
 Snowfall0  Unlock28
 Precipitation  Unlock88106
 Sunny283  Unlock205
 Avg. July High  Unlock8886
 Avg. Jan. Low46  Unlock22
 Comfort Index (higher=better)  Unlock7.17
 UV Index6.2  Unlock4.3
 Elevation  Unlock53282443
Reviews for Castaic    3 Reviews

Over 9 years ago

I've lived in northern Castaic for 14 years so this review is for northern Castaic Pros: convenient freeway access, boating on Lake Castaic, lots of gas stations,  More

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Over 11 years ago

Formerly a "truck stop" town, Castaic is the last town before going over the Grapevine, heading North on I-5 towards San Francisco. The town is unincorporated and sits  More

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Over 12 years ago

I currently live in Valencia. Before I consider purchasing a house in Castaic off Lake Hughes Rd and closer to the lake, is it safe to live in this neighborhood? Any  More

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Reviews for Boulder    55 Reviews

Outside of the university, Boulder had a very distinctive "wealthy hippy" feel. A lot of alternative medicine and a matching ethos. This is changing some among my  More

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We moved here from Texas about 4 years ago and love it here! The amazing sense of community and high regard for the environment are two of the main reasons we love  More

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Over 5 years ago

Most people do much worse than Boulder. I'm the most critical person I've ever met who is never happy or satisfied -- so that's a pretty huge compliment.   More

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