Nagasaki Weather in January

Nagasaki in January averages 12°C (54°F) during the day and 7°C (45°F) at night. This is the driest month of the year, and part of the winter season.

Rainfall in Nagasaki in January

Clear skies and little rain are the norm this month, even if it's not the warmest time of year. Still a good time to spend time outdoors. Historically, the month has about 21 days of rain, averaging 91 mm (3.6 in) in total. This is a month with many wet days but modest rainfall totals, so showers are generally light and easy to manage.

Temperature in Nagasaki in January

Temperatures in Nagasaki in January top out at 12°C (54°F) and drop to 7°C (45°F) overnight. The winter season is characteristic of January. Expect a cold feel throughout the day, not just in the mornings and evenings. Warm layers are essential. With overnight lows of 7°C (45°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets. This time of year is known for its most moderate and comfortable temperatures.

Sunshine in Nagasaki in January

You can expect a moderate amount of sunlight, with approximately 104 hours. This means a pleasant mix of sun and overcast.

Wind Speed in Nagasaki in January

Average wind conditions reach 2 m/s (4 knots) in January. This creates comfortable weather with light winds that gently move vegetation. Keep in mind this is an average. Daily conditions range from near-calm to more noticeable wind.

Average water temperature in January

With water at 16°C (61°F), it's on the cooler side. Keen swimmers won't be put off, but those who prefer warm water may find it less enjoyable.

If your ideal day consists of dry skies and pleasant temperatures, October typically offers the best circumstances for Nagasaki.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
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• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Japan, check out our Nagasaki's climate page.

Nagasaki Temperature in January

Min Temperature 7°C (45°F)  

Max Temperature 12°C (54°F)  

Water Temperature 16°C (61°F)  

Chance of Rain 70%  

Precipitation 91 mm (3.6 in)  

Rainy days 21 days  

Humidity 66%  

Windspeed 2 m/s (4 knots)  

Sunshine 104 hours  

Percentage Sunshine 32%  

Daily Historical Temperatures

51-year average (1976-2026)

Based on our historical records, temperatures in Nagasaki typically stay consistent throughout January, with daily highs averaging around 12°C (54°F). Nights are cold, with lows around 3°C (37°F).

Average temperatures in January

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Daily Historical Precipitation

51-year average (1976-2026)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in January

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‹ January February March April May June July August September October November December ›

Historical weather for Nagasaki in January

Browse day-by-day weather records for Nagasaki spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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Nagasaki historical weather extremes in January

Based on 49 years of weather observations in Nagasaki between 1976 and 2025, these are the recorded extremes.

• Nagasaki recorded its highest January temperature of 20°C (68°F) on January 15, 2002.
• The lowest daytime temperature in January was -1°C (30°F), recorded on January 24, 2016.
• The lowest overnight temperature recorded in January was -6°C (21°F) (January 24, 1976).

What to Wear in Nagasaki in January

The weather can be unpredictable in January, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Expect water temperatures of around 16°C (61°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Nagasaki in January

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

6/10

Walking

6/10

Camping

4/10

Outdoor sports

6/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Japan, check out our Nagasaki's climate page.

More climate data for Nagasaki

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Nagasaki climate overview or explore weather in Japan.