2025 Compare Cities Climate:
San Mateo, CA vs Union City, CA

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Highlights
- Union City has 32.0% less rainy days than San Mateo.
- Union City has 0.0% more Sunny Days than San Mateo.
- On the BestPlaces comfort index, Union City scores 3.5% better than San Mateo
 San Mateo, CAUnion City, CAUnited States
 Rainfall  Unlock1738
 Snowfall0  Unlock28
 Precipitation  Unlock64106
 Sunny265  Unlock205
 Avg. July High  Unlock7686
 Avg. Jan. Low42  Unlock22
 Comfort Index (higher=better)  Unlock8.87
 UV Index4.9  Unlock4.3
 Elevation  Unlock662443
Reviews for San Mateo    12 Reviews

I have lived in San Mateo since 2013. It has seen tremendous growth, lots of new restaurants which have become progressively more high-end though there is ample  More

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I'm a native of California. I have lived in the southern part of the state and the northern part of the state for most of my life. I have spent the last 29 years in  More

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Over 15 years ago

San Mateo has a diverse mix of people, a pleasant climate, a very pleasant downtown park with lots going on, and pretty much whatever you need handy. It's not far to  More

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Reviews for Union City    1 Reviews

Over 19 years ago

Hi, I am looking for a small, friendly town with low crime and friendly people, outdoor activites, mellow, etc. (in the bay area). I am currently hoping to move to  More

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