2025 Compare Cities Climate:
Costa Mesa, CA vs Walnut Creek, CA

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Highlights
- Walnut Creek has 63.3% more rainy days than Costa Mesa.
- Walnut Creek has 4.4% less Sunny Days than Costa Mesa.
- On the BestPlaces comfort index, Walnut Creek scores 8.6% worse than Costa Mesa
 Costa Mesa, CAWalnut Creek, CAUnited States
 Rainfall  Unlock2038
 Snowfall0  Unlock28
 Precipitation  Unlock62106
 Sunny274  Unlock205
 Avg. July High  Unlock8686
 Avg. Jan. Low48  Unlock22
 Comfort Index (higher=better)  Unlock8.57
 UV Index5.9  Unlock4.3
 Elevation  Unlock1712443
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 Walnut Creek    16 Reviews

Apart from the congestion, Walnut Creek is one of the best places in the San Francisco Bay Area to live. It is one of the most compact/walkable cities in the entire area  More

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Over 7 years ago

Almost all of Walnut Creek water comes from Pardee dam through an enclosed pipeline. That water is direct from the high Sierras. Among the best water quality in the  More

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Over 7 years ago

I grew up in Southern California and am no stranger to a more inland California climate. Before moving to WC I lived in San Francisco for 15 years where it is obviously  More

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