May · Japan
Best time to visit Nagasaki in May Weather, crowds & prices
Weather in Nagasaki in May
Average temperature 19°C, 243 mm of rain, about 24 days with 6+ hours of sunshine and 79% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
5.9/10
Ranked #3 of 12 months
- Avg temp
- 19°C
- Rainfall
- 243 mm
- Humidity
- 79%
- Days with 6h+ sun
- 24
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$ · Moderate Cost ($$)
May in Nagasaki scores 5.9/10 for sightseeing and cultural travel - one of the top 12-month picks (#3). Expect around 19°C, 243 mm of rain, and roughly 24 days with 6+ hours of sunshine this month.
Nagasaki's harbour hills hold a unique history of trade, Christianity and the atomic bombing.
May in Nagasaki: mixed conditions, plan around the weather
Temperatures hover around 19°C (66°F) — the kind of month where neither heat nor cold forces the schedule.
This is the year's wettest stretch at 243 mm, but with about 24 days with 6+ hours of sunshine it is not a total loss; an indoor fallback covers the risk.
That is 5.9/10 on the same scale — 3rd of 12 months, versus 6.9/10 for the best month here.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
Expect mid-season pricing, and crowds are moderate.
Frequently asked
- What is the weather like in Nagasaki in May?
- In May, Nagasaki averages 19°C, 243 mm of rain, and about 24 days with 6+ hours of sunshine. Its climate-comfort score is 5.9/10.
- Is May a good time to visit Nagasaki?
- May earns a 5.9/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Nagasaki in May?
- Expect about 243 mm of rain in May. Average humidity is 79% and there are about 24 days with 6+ hours of sunshine.
Curated in Nagasaki
Tickets & experiences
Things to do in Nagasaki
Nagasaki, Japan. Live activities and tours from GetYourGuide, matched to this destination.