Choosing when to visit Seattle, USA is one of the most important travel decisions you'll make. This guide compares all 12 months by average temperature, rainfall, sunshine hours, humidity and tourist crowds so you can match the trip to your priorities. We highlight the peak season, the shoulder season, and the best value months for Seattle, plus call out months travellers usually want to avoid because of heat, monsoon rain or extreme cold. Whether you want sunshine, fewer crowds, festivals, photography light, or comfortable walking weather, the page tells you which month delivers it in Seattle. We base recommendations on long-term climate data combined with current-season forecasts, so the advice reflects how Seattle actually feels — not just averages. Use this page alongside our 7-day "best day to visit" forecast for Seattle once you've chosen the month.
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