2025 Compare Cities Climate:
Potomac, MD vs Mercer Island, WA

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Highlights
- Mercer Island has 6.7% less rainy days than Potomac.
- Mercer Island has 22.4% less Sunny Days than Potomac.
- On the BestPlaces comfort index, Mercer Island scores 2.7% better than Potomac
 Potomac, MDMercer Island, WAUnited States
 Rainfall  Unlock3938
 Snowfall17  Unlock28
 Precipitation  Unlock153106
 Sunny201  Unlock205
 Avg. July High  Unlock7686
 Avg. Jan. Low25  Unlock22
 Comfort Index (higher=better)  Unlock7.57
 UV Index4.1  Unlock4.3
 Elevation  Unlock3352443
Reviews for Potomac    2 Reviews

Over 17 years ago

Spring and Fall can be quite glorious when the leaves turn or the tulips pop out and the humidity is lower. Winter, while it has some splendid "snow days," goes on much  More

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Over 17 years ago

The Potomac area in Montgomery County, Maryland, has the best of everything. High schools rated in the top 5 in the State, easy access to the Nation's Capitol,  More

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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

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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

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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

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