2025 Compare Cities Climate:
Costa Mesa, CA vs Ontario, CA

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Highlights
- Ontario has 30.8% more rainy days than Costa Mesa.
- Ontario has 1.8% more Sunny Days than Costa Mesa.
- On the BestPlaces comfort index, Ontario scores 5.4% worse than Costa Mesa
 Costa Mesa, CAOntario, CAUnited States
 Rainfall  Unlock1638
 Snowfall0  Unlock28
 Precipitation  Unlock31106
 Sunny274  Unlock205
 Avg. July High  Unlock9286
 Avg. Jan. Low48  Unlock22
 Comfort Index (higher=better)  Unlock8.87
 UV Index5.9  Unlock4.3
 Elevation  Unlock10042443
Reviews for Costa Mesa    8 Reviews

Over 15 years ago

Costa mesa has awesome shopping but is way too crowded and I have had 3 cars stolen in the past 5 years along with countless break-ins and theft. Expensive. Close to  More

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Over 16 years ago

Costa Mesa has a near perfect climate . . . plenty of sun but rarely over 100 degrees (our house doesn't even have AC). Nestled between Newport Beach and Huntington  More

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We have a good amount of low-income, medium-income, and relatively high-income  More

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Reviews for Ontario    6 Reviews

We've lived in this area for several years. Traveling long distances to other cities for churches. Passing a quiet, unassuming church along the way for years. Until  More

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cool  More

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I think Ontario,ca us awesome because we have an entertainment Venue and large shopping mall to please everyone of all  More

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