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Nagasaki, Japan · Temperate oceanic

Nagasaki in January: go or not?

Tough period. Nagasaki in January only reaches 4.1/10.

📅 Updated August 2026 🛰️ ERA5 · 10 years 📍 32.75°N · 129.88°E
⚡ This month's verdict
Avoid
Nagasaki · January
4.1
5–11°
Temperature
29%
Rain
3h
Sun
🌊 Seaside☀️ Bright🍴 Gastronomy
Photo : Tayawee Supan via Unsplash
The month in detail

What to expect in January

In January, Nagasaki sees 11.0°F during the day with 3.3h of sunshine per day. Expect rain on 29.0% of days — a light raincoat in the bag is recommended.

January ranks 11 out of 12 months in Nagasaki. Compared to December: −2°F daytime.

This month's conditions

What it's like in January

UV index
3 · moderate
protect during midday hours
Feels like
dry air
2°
Sea
15°C
cold, for the brave
Daylight
10.1h of daylight
Air quality
good
AQI 27
Compare

Is January the right month?

The best month in Nagasaki is October (7.9/10), 3.8 pts higher than January.

See October →See all 12 months →
Context

Our verdict

Nagasaki, the 2nd city to suffer an atomic bombing on 9 August 1945 (74,000 deaths), keeps a singular history in Japan: the only port open to Europeans (Dutch and Portuguese) during the Edo isolation (1639-1854), Christian influence unique in Japan. October is my favorite month (8.2/10): 64-73°F, 27% rain, ideal temperatures before winter.

Read Gilles' full review →

Book

Plan your trip

Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.

🏨
Stay
Hotels & rentals · Nagasaki
Expedia →
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Activities
Tours, tickets, experiences
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Flights
Multi-airline comparator
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🎟️ Activities & tours · Nagasaki

GetYourGuide selection · free cancellation

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Practical info

What you need to know before you go

Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach trip.

Country · Japan

🗣️LanguageJapanese
💶CurrencyYen japonais (¥)
🚗DrivingLeft-hand
🛡️Safety ⓘSafe · 2/5
💰Cost of living ⓘModerate · 3/5

🌡️ Climate

🌍Climate typeTemperate oceanic
📈Climate trend ⓘStable
🔥Hottest monthAugust · 88°F
❄️Coolest monthJanuary · 52°F
🌧️Rainiest month ⓘJuly · 58%

🏖️ Beach trip

📅Peak seasonJuin → Sept
🏖️Swell (Sept–Mar) ⓘModérée
Explore

Other destinations in January

If January doesn't convince you for this destination, compare with others.

Similar climate
FukuokaJapanMatsuyamaJapanShanghaiChinaSuzhouChinaHiroshimaJapan
Nearby
BusanSouth Korea280 kmHiroshimaJapan301 kmJejuSouth Korea323 kmYongpyongSouth Korea559 km
Other top picks
JordanJordan4.4PetraJordan4.4LilongweMalawi4.5HarareZimbabwe4.6BrisbaneAustralia5.3
← DecemberFebruary →
🗺️ See all 754 destinations on the map
Location

Where is Nagasaki ?

Global position + regional geographic context.

🌍 World
🔍 Geographic context
Japan
Temperate oceanic climate with a 7.9 → 4.1 gap between best and worst month. 10 years of ERA5 data to choose by project.
32.75°N · 129.88°E
Questions

Frequently asked questions

What is the best time to visit Nagasaki?
October is the best month with 73°F highs, 64°F lows, 5.8h of sunshine and 27.0% rainy days. The months of October & September offer comparable conditions.
How many hours of sunshine does Nagasaki get in October?
Nagasaki averages 5.8 sunshine hours per day in October. It is the sunniest month with a climate score of 7.4/10.
What is the rainiest month in Nagasaki?
January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Nagasaki in October?
In October, overnight lows reach 64°F, while afternoon highs average 73°F.
Is Nagasaki good in winter?
In winter (December-February), Nagasaki scores 4.0/10 on average — Difficult period — prefer the peak season.. The best month overall remains October with a score of 7.4/10.
When should you avoid Nagasaki?
January is the most difficult month to visit Nagasaki, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Nagasaki in January?
In January, the sea averages 60°F in Nagasaki: cold, for the brave. Best left to hardened swimmers or those with a wetsuit.
Do you need sun protection in Nagasaki in January?
The average UV index reaches 3 in January in Nagasaki (moderate), with about 10.1h of daylight. Protect during midday hours.