Nagasaki weather in January
January in Nagasaki: cool, a little rain, with clean air — a good time to visit.
#8 of 12 months in Nagasaki · #480 of 897 destinations to visit in January · comfort 69/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Nagasaki in January
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Nagasaki climate normals — January
| Daytime high | 11°C / 51°F | 🙂 cool |
|---|---|---|
| Nighttime low | 7°C / 44°F | |
| Rainfall | 77 mm / 3 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 66% | 💧 humid |
| Dew point | 2°C / 36°F | |
| Sunshine | 6.5 h/day | |
| Daylight | 10.3 h | |
| Wind | 24 km/h / 15 mph | |
| Snowfall | 1.2 cm / 0.5 in | |
| Air quality (US AQI) | 45 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Nagasaki in January — FAQ
- Is January a good time to visit Nagasaki?
- January in Nagasaki: cool, a little rain, with clean air — a good time to visit. It ranks #8 of 12 months for Nagasaki on SeasonMap's comfort score (69/100).
- What is the weather like in Nagasaki in January?
- In January, Nagasaki averages a daily high of 10.5°C and a low of 6.9°C, with about 77.3 mm of rain over roughly 8.2 rainy days.
- What is the air quality in Nagasaki in January?
- Nagasaki has a mean US Air Quality Index of about 45 in January.
- Does it snow in Nagasaki in January?
- Nagasaki sees roughly 1.2 cm of snowfall in January.