2026 Compare Cities Climate:
Foster City, CA vs Altadena, CA

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Highlights
- Altadena has 17.8% more rainy days than Foster City.
- Altadena has 9.5% more Sunny Days than Foster City.
- On the BestPlaces comfort index, Altadena scores 4.6% better than Foster City
 Foster City, CAAltadena, CAUnited States
 Rainfall  Unlock2338
 Snowfall0  Unlock28
 Precipitation  Unlock37106
 Sunny262  Unlock205
 Avg. July High  Unlock8686
 Avg. Jan. Low41  Unlock22
 Comfort Index (higher=better)  Unlock9.17
 UV Index4.9  Unlock4.3
 Elevation  Unlock13582443
Reviews for Foster City    4 Reviews

Over 18 years ago

Built on lagoons, great climate, good schools, lots of soccer and other sports for kids, plenty of parking and  More

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Over 19 years ago

A great city to raise a family, safe, great weather around the year, good schools and plenty of recreation. But only if you can afford the hight cost of  More

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Landlords are able to command and receive high rent due to the following attributes: safety, weather and cleanliness of Foster City. The lagoon, waterways and gardens  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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