Best time to visit Seattle: weather, crowds and events by month

Seattle has a mild, wet winter and a dry, bright summer, and the gap between the two is bigger than the temperature range suggests. Summer highs sit around 24 °C; winter highs around 8 °C. What changes most is rain and daylight, and that is what should drive your dates.

July and August are the reliable months: mostly dry, warm enough for the waterfront and the ferries, and light until after 21:00. Late June is nearly as good and slightly cheaper, though showers can still interrupt a day. September is the quiet winner — the rain usually holds off until October, the crowds thin after Labor Day, and hotel rates fall.

October is a transition month: some clear, cool days, some wet ones, and the start of the grey stretch. November through February is the wet season, with rain on a majority of days, early darkness and the lowest prices of the year outside Thanksgiving and Christmas. March and April stay cool and showery; May improves but is still unsettled.

Seattle's peak runs from late June through August, driven by school holidays, Alaska cruise departures from the waterfront piers, and the region's own festival season. Hotel rates in that window are the highest of the year, and downtown rooms near Pike Place fill first. Book summer accommodation two to three months ahead if you want a specific neighbourhood or a room with a view.

The cheapest weeks are January and February, plus the first half of November before Thanksgiving. Expect rain and short days, but also lower airfares and hotel rates. Late November and the last two weeks of December are the exception: Thanksgiving and Christmas travel push prices up even though the weather is poor.

For a middle path, aim at the second week of September or the last week of May. You get decent odds of dry weather, fewer people at the market and the Space Needle, and rates closer to shoulder-season levels.

Summer is festival season. Seafair, Seattle's big summer celebration, brings hydroplane races and Blue Angels flyovers over Lake Washington, usually in late July or early August, and fills waterfront hotels. The Fourth of July brings fireworks over Lake Union. Bumbershoot, the city's long-running arts and music festival, has historically run around Labor Day weekend at Seattle Center.

Spring means cherry blossoms on the University of Washington campus, typically late March into early April, and the Skagit Valley tulip fields about an hour north, usually April. Both draw crowds on sunny weekends.

Autumn brings college football at Husky Stadium and the start of the cultural season downtown. Winter is the quietest time for attractions but the busiest for holiday lights and shopping. Dates for all of these shift year to year, so confirm before you build a trip around one.

Prices below are 2026 estimates for a mid-range trip and swing widely with demand. Summer is the expensive window; January and February are the cheap one.

Flights into Seattle-Tacoma International (SEA) are usually cheapest in January–February and most expensive in July–August and around Thanksgiving and Christmas. Once you land, Link light rail runs from the airport to downtown; see the airport transfer page for the current fare and timing.

Pack for rain rather than cold. A light waterproof shell and shoes that can get wet matter more than a heavy coat, especially from October to April. Layers work year-round because mornings and evenings are cool even in July.

Summer days are long, so plan outdoor sights — the waterfront, ferries, Kerry Park, Discovery Park — for the evening light. In winter, plan indoor stops: the market, museums, coffee, and the ferries, which run in any weather.

If you are combining Seattle with the wider region, note that mountain roads in the Cascades and around Mount Rainier are typically open only from about June to October, and that August and September can bring wildfire smoke. Check conditions before committing to a hiking day.