August · Japan
Best time to visit Nagasaki in August Weather, crowds & prices
Weather in Nagasaki in August
Average temperature 28°C, 238 mm of rain, about 27 days with 6+ hours of sunshine and 83% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
August score
3.4/10
Ranked #12 of 12 months
- Avg temp
- 28°C
- Rainfall
- 238 mm
- Humidity
- 83%
- Days with 6h+ sun
- 27
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
August in Nagasaki scores 3.4/10 for sightseeing and cultural travel - ranked #12 of 12. Expect around 28°C, 238 mm of rain, and roughly 27 days with 6+ hours of sunshine this month.
Nagasaki's harbour hills hold a unique history of trade, Christianity and the atomic bombing.
August in Nagasaki: expect compromises
Days in August average 28°C (83°F) and humidity near 83% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
This is the year's wettest stretch at 238 mm, but with about 27 days with 6+ hours of sunshine it is not a total loss; an indoor fallback covers the risk.
That is 3.4/10 on the same scale — 12th of 12 months, versus 6.9/10 for the best month here.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Expect low-season pricing, and crowds are light for this destination.
If your dates are flexible, October is materially better in Nagasaki — 3.5 points higher on the same scale.
Frequently asked
- What is the weather like in Nagasaki in August?
- In August, Nagasaki averages 28°C, 238 mm of rain, and about 27 days with 6+ hours of sunshine. Its climate-comfort score is 3.4/10.
- Is August a good time to visit Nagasaki?
- August earns a 3.4/10 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 August?
- Expect about 238 mm of rain in August. Average humidity is 83% and there are about 27 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.