Nagasaki weather by month & the best time to visit
🇯🇵 Japan · coastal city break · humid subtropical climate
The best time to visit Nagasaki is October — its sunniest month (Sunshine Score 67/100), with May and June close behind. Nagasaki averages about 1,779 hours of sunshine a year. Daytime highs around 23°C / 73°F and roughly 117 mm of rain in October.
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- Sun hours / year
- 1,779
- Sunniest month
- October
- Peak score
- 67/100
- Rain / year
- 2,077 mm
- Midday UV at peak
- 8 (very high)
- Sea at warmest
- 30°C / 86°F
- Population
- 435k
- Elevation
- Sea level
When is the best time to visit Nagasaki?
For sunshine, the best time to visit Nagasaki is October, then May and June. The dullest month is January (13/100, 71 mm of rain). The full month-by-month picture is in the table below.
How sunny is Nagasaki?
Nagasaki isn't a sunny place by world standards: about 1,779 hours of sunshine a year. 54 Sunshine Score points separate October (67) from January (13), so the month you pick matters. It ranks #39 of 79 destinations in Japan for annual sunshine, above the national median of 1,773 hours. Rain has a clear season: the wettest stretch, around July, carries about 44% of the annual 2,077 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 13 | 10° / 50°F | 3° / 37°F | 71 mm | 2 | 15° / 59°F |
| February | 24 | 12° / 54°F | 4° / 39°F | 99 mm | 3 | 16° / 61°F |
| March | 38 | 15° / 59°F | 6° / 43°F | 131 mm | 5 | 16° / 61°F |
| April | 56 | 19° / 66°F | 10° / 50°F | 167 mm | 6 | 18° / 64°F |
| May | 61 | 24° / 75°F | 15° / 59°F | 186 mm | 6 | 20° / 68°F |
| June | 61 | 27° / 81°F | 19° / 66°F | 333 mm | 6 | 24° / 75°F |
| July | 61 | 30° / 86°F | 24° / 75°F | 352 mm | 8 | 28° / 82°F |
| August | 61 | 31° / 88°F | 24° / 75°F | 225 mm | 8 | 30° / 86°F |
| September | 61 | 28° / 82°F | 21° / 70°F | 201 mm | 7 | 29° / 84°F |
| October | 67 | 23° / 73°F | 16° / 61°F | 117 mm | 5 | 26° / 79°F |
| November | 53 | 17° / 63°F | 11° / 52°F | 103 mm | 3 | 23° / 73°F |
| December | 24 | 12° / 54°F | 6° / 43°F | 92 mm | 2 | 18° / 64°F |
Sea temperature in Nagasaki by month
The sea off Nagasaki is warmest in August at around 30°C / 86°F, and coolest in January at 15°C / 59°F. The water sits at a comfortable 21°C or warmer roughly 6 months a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
See Nagasaki on the interactive sunshine globe →
Nearby places for sunshine
- Saga Japan · 44 km · best in Oct · 1,752 h sun/yr
- Kumamoto Japan · 88 km · best in Oct · 1,845 h sun/yr
- Fukuoka Japan · 90 km · best in Oct · 1,752 h sun/yr
- Kagoshima Japan · 145 km · best in Oct · 1,843 h sun/yr
- Kitakyushu Japan · 147 km · best in Oct · 1,801 h sun/yr
- Ube Japan · 170 km · best in Oct · 1,801 h sun/yr
Nearest destinations
- Amakusa Japan · 53 km · 1,845 h sun/yr · best in Oct
- Iki Japan · 93 km · 1,740 h sun/yr · best in Oct
- Goto Japan · 105 km · 1,677 h sun/yr · best in Oct
Head-to-head
How Nagasaki compares month by month: Nagasaki vs Fukuoka · Nagasaki vs Kumamoto · Nagasaki vs Kagoshima · Nagasaki vs Saga · all comparisons
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