Click on a day for an hourly weather forecast
The temperatures in Nagasaki in October are comfortable with low of 17°C and and high up to 23°C.
You can expect about 3 to 8 days of rain in Nagasaki during the month of October. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Nagasaki in October 2025.
If you’re planning to visit Nagasaki in the near future, we highly recommend that you review the 14 day weather forecast for Nagasaki before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 10° / 5° | 8 | 19 | 4 | 84 mm | Awful | Nagasaki in January |
| February | 11° / 6° | 7 | 19 | 2 | 111 mm | Awful | Nagasaki in February |
| March | 14° / 9° | 7 | 23 | 0 | 121 mm | Ok | Nagasaki in March |
| April | 18° / 12° | 7 | 23 | 0 | 140 mm | Ok | Nagasaki in April |
| May | 22° / 16° | 7 | 24 | 0 | 145 mm | Ok | Nagasaki in May |
| June | 25° / 20° | 10 | 20 | 0 | 297 mm | Good | Nagasaki in June |
| July | 28° / 24° | 12 | 19 | 0 | 368 mm | Good | Nagasaki in July |
| August | 30° / 25° | 11 | 20 | 0 | 335 mm | Ok | Nagasaki in August |
| September | 27° / 22° | 8 | 22 | 0 | 198 mm | Good | Nagasaki in September |
| October | 23° / 17° | 4 | 27 | 0 | 104 mm | Perfect | Nagasaki in October |
| November | 17° / 13° | 5 | 25 | 0 | 126 mm | Good | Nagasaki in November |
| December | 12° / 7° | 7 | 22 | 2 | 109 mm | Awful | Nagasaki in December |