May · United States
Best time to visit Seattle in May Weather, crowds & prices
Weather in Seattle in May
Average temperature 13°C, 82 mm of rain, about 23 days with 6+ hours of sunshine and 82% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
7.8/10
Ranked #5 of 12 months
- Avg temp
- 13°C
- Rainfall
- 82 mm
- Humidity
- 82%
- Days with 6h+ sun
- 23
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
May in Seattle scores 7.8/10 for sightseeing and cultural travel - an above-average month (#5 of 12). Expect around 13°C, 82 mm of rain, and roughly 23 days with 6+ hours of sunshine this month.
Ferry views, coffee culture, and evergreen trails peak in clearer May-September weather.
May in Seattle: strong conditions, 5th of 12
May averages 13°C (55°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 82 mm, so plan one flexible day in three; you still get about 23 days with 6+ hours of sunshine and 14.9 hours of daylight.
It scores 7.8/10 here, 5th of 12 months, against 9.6/10 in the destination's best month.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
Plan for mid-season pricing, with crowds are moderate.
Flexible dates? July scores 1.8 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Seattle in May?
- In May, Seattle averages 13°C, 82 mm of rain, and about 23 days with 6+ hours of sunshine. Its climate-comfort score is 7.8/10.
- Is May a good time to visit Seattle?
- May earns a 7.8/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Seattle in May?
- Expect about 82 mm of rain in May. Average humidity is 82% and there are about 23 days with 6+ hours of sunshine.
Curated in Seattle
Tickets & experiences
Things to do in Seattle
Seattle, United States. Live activities and tours from GetYourGuide, matched to this destination.