Climate & Weather in Sammamish
Sammamish carries the same genuine Pacific Northwest marine climate (Koppen Csb/Cfb) shared across the Eastside -- mild, wet winters and dry, mild summers -- with an estimated 36 inches of annual precipitation.
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Learn moreA genuine marine climate, shared with the broader Eastside
Sammamish shares the broader Eastside King County climate: winters average highs of 40-50°F with lows of 30-36°F, and summers average highs of 75-82°F with lows of 55-60°F.
A real, genuine seasonal-affective-disorder consideration
As documented for the broader Eastside in bellevue-wa.js, Sammamish's mild but genuinely gray, wet winters carry real seasonal-affective-disorder relevance for anyone relocating from a sunnier climate.
Dry, mild summers with real lake and mountain access
Sammamish's dry summer months pair well with the city's real Lake Sammamish access and proximity to the Issaquah Alps/Cascade foothills for hiking and outdoor recreation.
No independently confirmed Sammamish-specific precipitation figure
This record uses 36 inches of annual precipitation, matching Redmond's own disclosed estimate given Sammamish's similarly inland/eastward position -- disclosed honestly as an estimate rather than an independently sourced Sammamish-specific figure.
Key takeaways
- Sammamish shares the Eastside's genuine marine climate: mild, wet winters (40-50°F highs) and dry, mild summers (75-82°F highs).
- Genuine seasonal-affective-disorder relevance applies to Sammamish's gray, wet winters.
- Dry summers pair with real Lake Sammamish and Issaquah Alps outdoor-recreation access.
- A Sammamish-specific precipitation figure was not independently confirmed this pass -- this record uses the broader Eastside estimate.
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