Nagasaki Weather in September
27°C high · 20.2°C low · 217 mm rain · 6.8h sun
Sep is a warm month in Nagasaki — not peak season, but a good time to avoid crowds.
September at a glance
| Metric | Value |
|---|---|
| Average high | 27°C |
| Average low | 20.2°C |
| Rainfall | 217 mm |
| Sunshine | 6.8 hours/day |
| Daylight | 12.2 hours |
What to pack in September
Pack comfortable clothes with a light layer for evenings, plus a raincoat and umbrella for Nagasaki in September.
Nagasaki weather by month
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Frequently asked questions
What is the weather in Nagasaki in September?
Highs of 27°C and lows of 20.2°C, with about 217 mm of rain and 6.8 hours of sunshine per day.
Is September a good time to visit Nagasaki?
Sep is a warm month in Nagasaki — not peak season, but a good time to avoid crowds.
What to do in Nagasaki · Best time to visit Nagasaki
Climate data: Open-Meteo Historical (ERA5), 1991–2020. CC BY 4.0.