2025 Compare Cities Climate:
Mercer Island, WA vs Mill Valley, CA

Change Cities
Highlights
- Mill Valley has 3.6% more rainy days than Mercer Island.
- Mill Valley has 63.5% more Sunny Days than Mercer Island.
- On the BestPlaces comfort index, Mill Valley scores 12.0% better than Mercer Island
 Mercer Island, WAMill Valley, CAUnited States
 Rainfall  Unlock4138
 Snowfall5  Unlock28
 Precipitation  Unlock78106
 Sunny156  Unlock205
 Avg. July High  Unlock7786
 Avg. Jan. Low37  Unlock22
 Comfort Index (higher=better)  Unlock8.47
 UV Index2.6  Unlock4.3
 Elevation  Unlock822443
Reviews for Mercer Island    4 Reviews

Mercer Island is a wonderful family community. It feels much more "small town" than a city even though it has a population of 20,000+. People say hello and watch out  More

   |    Reply

Mercer Island is a suburb of Seattle, located on an island in Lake Washington. The best thing about Mercer Island is its strategically central location relative to the  More

   |    Reply

Mercer Island is a suburb of Seattle, located on an island in Lake Washington. The best thing about Mercer Island is its strategically central location relative to the  More

   |    Reply

Start Your Review of Mercer Island

Reviews for Mill Valley    7 Reviews

I lived in southern Marin County for 20 years and lived it. Just moved  More

   |    Reply

Over 15 years ago

Mill Valley is a perfect place to live and raise a family, if you don't mind a cost of living index of 233. Don't distress - go mountain biking or hiking with  More

   |    Reply

Over 16 years ago

Good weather all year around. Great public schools. Cost of living very high. Crime low wonderful outdoor activities nearby like hiking, beaches,  More

   |    Reply

Start Your Review of Mill Valley


Premium Subscription
Includes Cost of Living compares for child care, utilities, transportation, health, taxes, housing for home owners vs renters, weather, insurance premiums and so much more.


The premier source for comprehensive city data for over 30 years.

© Best Places. All rights reserved.