Climate & Weather in Bainbridge Island
Bainbridge Island carries a genuine Pacific Northwest marine climate (Koppen Csb/Cfb), but with meaningfully higher annual precipitation (44 inches) than the mainland Eastside cities in this batch, reflecting the island's full exposure to Puget Sound marine weather.
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Learn moreA genuinely wetter marine climate than the mainland Eastside
Bainbridge Island receives roughly 44 inches of rain annually across about 157 days -- genuinely more than the 35-36 inches cited for Bellevue, Kirkland, and Sammamish, reflecting the island's full exposure to Puget Sound marine weather without the partial rain-shadow benefit some Eastside cities receive from the Olympic Mountains.
A real temperature range and modest snowfall
Temperatures typically range from 37°F to 78°F across the year, rarely dropping below 28°F or exceeding 87°F. The island receives roughly 4 inches of snow per year -- a real, if modest, winter presence.
Real seasonal-affective-disorder relevance, genuinely amplified by higher rainfall
Bainbridge's genuinely higher rainfall than the mainland Eastside cities in this batch means the real seasonal-affective-disorder relevance disclosed for the broader Puget Sound region applies with, if anything, slightly greater force here.
Dry summers: July is the driest month
July receives only about 1.4 inches of rain on average, the driest month of the year -- a real, genuine payoff season for the island's outdoor and waterfront lifestyle, with December the wettest month at roughly 7.4 inches.
Key takeaways
- Bainbridge Island receives roughly 44 inches of annual rain -- genuinely more than the mainland Eastside cities in this batch.
- Temperatures typically range 37°F-78°F, with roughly 4 inches of snow per year.
- Real seasonal-affective-disorder relevance applies, arguably amplified by the island's higher rainfall.
- July is the driest month (~1.4 in.); December is the wettest (~7.4 in.).
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