Nagasaki Climate by Month
Nagasaki, Japan
Hot summers and cool winters, with rain spread through the year.
Hot summers and cool winters, with rain spread through the year: that's Nagasaki's climate in short. August is the warmest month, with highs around 87°F (31°C); January is the coolest at 50°F (10°C), and nights dip to 38°F (3°C). It gets 81 in (2067 mm) of rain a year, spread across the months.
- Warmest month
- 87°F(31°C)
- Average high, August
- Coldest nights
- 38°F(3°C)
- Average low, January
- Rain per year
- 81 in(2067 mm)
- No clear rainy season
- Humidity
- 73%
- Sunniest: August
Best and worst months in Nagasaki
Best for weatherOctober is the best time for weather in Nagasaki: highs near 73°F (23°C) and about 3.8 in (96 mm) of rain a month.
Least pleasantJuly is the least pleasant month: it's the wettest, with 14 in (366 mm) of rain.
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in October.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Nagasaki weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 50°F(10°C) | 38°F(3°C) | 2.7 in(69 mm) | 62% | 2.2 |
| FebFebruary | 51°F(11°C) | 39°F(4°C) | 3.6 in(91 mm) | 69% | 2.9 |
| MarMarch | 58°F(14°C) | 44°F(6°C) | 5.2 in(133 mm) | 72% | 3.9 |
| AprApril | 66°F(19°C) | 51°F(11°C) | 6.0 in(152 mm) | 72% | 4.6 |
| MayMay | 73°F(23°C) | 59°F(15°C) | 6.9 in(175 mm) | 73% | 5.1 |
| JunJune | 78°F(25°C) | 66°F(19°C) | 16 in(399 mm) | 83% | 4.4 |
| JulJuly | 84°F(29°C) | 74°F(23°C) | 14 in(366 mm) | 82% | 4.9 |
| AugAugust | 87°F(31°C) | 75°F(24°C) | 8.5 in(216 mm) | 77% | 5.2 |
| SepSeptember | 82°F(28°C) | 69°F(21°C) | 8.0 in(202 mm) | 77% | 4.3 |
| OctOctoberBest | 73°F(23°C) | 60°F(16°C) | 3.8 in(96 mm) | 67% | 3.7 |
| NovNovember | 64°F(18°C) | 51°F(10°C) | 3.6 in(92 mm) | 69% | 2.7 |
| DecDecember | 54°F(12°C) | 41°F(5°C) | 3.0 in(76 mm) | 71% | 2.1 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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