2025 Compare Cities Climate:
Union City, CA vs Altadena, CA

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Highlights
- Altadena has 35.5% more rainy days than Union City.
- Altadena has 8.3% more Sunny Days than Union City.
- On the BestPlaces comfort index, Altadena scores 3.4% better than Union City
 Union City, CAAltadena, CAUnited States
 Rainfall  Unlock2338
 Snowfall0  Unlock28
 Precipitation  Unlock37106
 Sunny265  Unlock205
 Avg. July High  Unlock8686
 Avg. Jan. Low42  Unlock22
 Comfort Index (higher=better)  Unlock9.17
 UV Index5.4  Unlock4.3
 Elevation  Unlock13582443
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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Reviews for Altadena    1 Reviews

I live just above the 1500 foot elevation at the edge of the San Gabriel Mountains in the L.A. suburb of Altadena--just above Pasadena. We're above the low morning fog  More

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