Packing List
September Packing List for Seattle — What to Wear & Bring
Pack light-to-mid layers — summer tops, a light sweater, and a packable jacket for 52°F evenings. Seattle's September is often the best month to visit: near-summer warmth at 70°F, only 7 rain days, and dramatically lower tourist crowds than July and August at Pike Place Market.
Averages 52–70°F, ~7 days of rain
Clothing
Seattle's September 70°F afternoons are warm and pleasant — a mix of summer tops and light long-sleeve shirts covers the day's range from the 52°F mornings to the warm afternoons across Capitol Hill and the waterfront.
Seattle's September evenings drop to 52°F, particularly near the Elliott Bay waterfront and the Olympic Sculpture Park — a light sweater or cardigan is the essential evening layer for outdoor Capitol Hill and waterfront dining.
Seattle's September evenings on the Elliott Bay waterfront at 52°F with Puget Sound wind require a packable light jacket — evening walks from Pike Place to the waterfront benefit from an extra layer after sunset.
September is Seattle's under-rated summer — 70°F afternoons with low humidity make light dresses and shorts appropriate for Capitol Hill outdoor dining, Green Lake walks, and Alki Beach visits.
Seattle's September evenings at 52°F reward full jeans or casual pants for comfortable outdoor dining on Capitol Hill's restaurant row and evening walks along the waterfront.
Footwear
Seattle's September is prime weather for extended neighborhood exploring — Pike Place Market's cobblestone ramps, Capitol Hill's hillside streets, and the waterfront promenade all reward flat-soled, comfortable footwear.
September's 70°F afternoons are the last reliable sandal weather of the year in Seattle — Alki Beach and the Capitol Hill outdoor patio circuit are comfortable for open footwear through most of the month.
Seattle's September 7 rain days include the occasional heavier fall shower — a water-resistant sneaker handles wet conditions on Pike Place's cobblestones and Capitol Hill streets without full winter boots.
Accessories
Seattle's September golden light is genuinely beautiful — sunglasses are essential for the Elliott Bay waterfront views of the Olympic Mountains and the Mt. Rainier sightlines from South Lake Union.
September evenings in Seattle cool to 52°F, especially near the Elliott Bay waterfront — a packable light jacket handles the temperature drop for evening outdoor dining and waterfront walks.
Seattle's September 7 rain days begin to return the city's drizzle pattern — while locals still prefer a waterproof shell, a compact umbrella works on drier days when a full shell feels like overkill.
Seattle's September warm sunny days are deceptively UV-intense at high latitude — SPF 30 is useful for extended outdoor time at Alki Beach and the waterfront on September's clear sunny days.
Local tips for Seattle in September
- 1.Seattle's September is consistently rated the city's best month by locals — 70°F weather, only 7 rain days, dramatically lower tourist crowds than July and August, and the city's outdoor spaces still fully open; Pike Place Market is far more enjoyable in September than July.
- 2.Seattle's Bumbershoot music and arts festival traditionally runs over Labor Day weekend at Seattle Center — the outdoor stages near the Space Needle are exposed to the Elliott Bay wind, so pack a light jacket even for warm September afternoons.
- 3.September is the last month to kayak on Lake Union comfortably before the rainy season returns — the South Lake Union neighborhood kayak rentals are popular on clear September days with views of the Space Needle from the water.