Nagasaki Weather in September
Japan · 30-year monthly averages
🤔 Fair time to visit
September in Nagasaki is warm, with average daytime highs around 29°C (84°F) and nighttime lows near 22°C (71°F). Expect roughly 187mm of precipitation spread over about 9 rainy days, and this is one of the wetter months.
Avg high
29°C
84°F
Avg low
22°C
71°F
Rainfall
187mm
rainy
Rainy days
9
days with ≥1mm
☀️ About 172 hours of sunshine over the month (~6h/day).
🎒 What to pack
- light summer clothing
- sunscreen and sunglasses
- compact umbrella or rain jacket
September vs the rest of the year
FAQ
- How hot is Nagasaki in September?
- September in Nagasaki is warm, with average daytime highs around 29°C (84°F) and nighttime lows near 22°C (71°F). Expect roughly 187mm of precipitation spread over about 9 rainy days, and this is one of the wetter months.
- Does it rain a lot in Nagasaki in September?
- Nagasaki sees around 187mm of precipitation in September on average — rainy by global standards.
- Is September a good time to visit Nagasaki?
- September is a workable month to visit Nagasaki, but expect some weather trade-offs.