2026 Compare Cities Climate:
Mill Valley, CA vs Potomac, MD

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Highlights
- Potomac has 3.4% more rainy days than Mill Valley.
- Potomac has 21.2% less Sunny Days than Mill Valley.
- On the BestPlaces comfort index, Potomac scores 13.1% worse than Mill Valley
 Mill Valley, CAPotomac, MDUnited States
 Rainfall  Unlock4238
 Snowfall0  Unlock28
 Precipitation  Unlock114106
 Sunny255  Unlock205
 Avg. July High  Unlock8686
 Avg. Jan. Low43  Unlock22
 Comfort Index (higher=better)  Unlock7.37
 UV Index5.2  Unlock4.3
 Elevation  Unlock3612443
Reviews for Mill Valley    7 Reviews

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

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Over 16 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

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Over 17 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

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Reviews for Potomac    2 Reviews

Over 18 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 18 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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