What to Wear in Seattle in Summer: Month-by-Month Outfit Guide
Seattle in summer sits in the 70 to 85°F range. This is the layer-by-layer outfit guide for Seattle's summer weather — what to wear, what to pack for a visit, and the local context that shapes the recommendations.
WHAT TO EXPECT
Seattle in summer — June, July, August. July through September. The reward season. 70-85°F, low humidity, often dry. Light fabrics, sunglasses, sun protection (Pacific Northwest sun can be intense after months of overcast). The temperature range is the headline; what you actually feel depends on humidity, wind, and what indoor spaces you'll cycle through.
THE FOUNDATION LAYER
Lightweight, breathable single layer. Linen, cotton voile, or technical synthetic.
THE MID LAYER
Skip it. Seattle summer doesn't need a mid layer.
THE OUTERWEAR
None. The "outer layer" in Seattle in summer is air conditioning. Carry a light wrap or button-down for over-AC restaurants.
ACCESSORIES
Sun hat, UV-rated sunglasses, sandals or breathable sneakers, and a light scarf for over-AC interiors.
WHAT TO PACK FOR A TRIP TO SEATTLE IN SUMMER
Three layer permutations covering the 70 to 85°F range, plus accessories. If your trip spans the season's edge (late May or early September), pack toward the cooler end of the range — overestimating warmth is easier to recover from than underestimating.
LOCAL CONTEXT
Locals do not use umbrellas — they use hoods. A water-resistant breathable jacket is the most useful single garment in Seattle. Light rain (Seattle's typical) demands a different jacket than heavy rain (a Gore-Tex shell with sealed seams).