Nagasaki Weather in July

Season: Summer

Overview:
1. The hot weather combined with high humidity in July makes you feel very sticky.
2. Precipitation in early and mid-July is far more than that of late July.
3. You can experience splendid fireworks and Pyron Championships in Nagasaki Port in late July.

How Hot Is Nagasaki in July?

The weather of Nagasaki in July is very hot. The average monthly high temperature is 30 degrees Celsius (86 degrees Fahrenheit) and the average monthly low temperature is 25℃ (77℉). In most days, the maximum temperature is above 28℃ (82.4℉). There are about 8-10 days with a high temperature of over 31℃ (87.8℉). The highest temperature in July ever recorded in the history of Nagasaki was 35℃ (95℉). Even in the morning and evening, the temperature is usually at 24-26℃ (75.2-78.8℉).

With the monthly average sea temperature at 25-26℃ (77-78.8℉), tourists can have a comfortable experience in the sea.

Having Lunch around Hot Noon

Precipitation & Humidity

Under normal conditions, the rainy season has not yet ended until late-July from its beginning in early June, so rainy weather is very common in the early and middle periods of July. On average, there are approximately 19 days, two-thirds of this month when Nagasaki city is washed by the rainfall, and the monthly average precipitation is 332 mm. Heavy rain possibly occurs 3-4 times. Moderate and light rainfalls remain the dominant feature of the whole month.

Nagasaki after the Rain in July

Imagine a situation that is highly likely to occur in this month where rainy weather is followed by sunny weather or vice versa, you would find yourself in a damp and hot environment, which makes you feel extremely sticky and uncomfortable.

The monthly average relative humidity reaches its peak in July throughout the year, about 84%.

Daylight Hours & Sunlight Hours

The average daylight duration in July is 14 hours from an early sunrise time at around 5:22 to a late sunset time at around 19:28. Considering the long days and uncomfortably hot or sticky weather during the sunny day, especially around noon, you are recommended to start your trip early and avoid going out around noon time.

Excluding the rainy and cloudy hours, Nagasaki can receive sunlight for approximately 5 hours on average each day in July. The most notable fact is that the ultraviolet index in July is one of the highest throughout the year, at 11. Thus, you need to make sure your sunscreen and other protective gear are all well-prepared if you are going to visit Nagasaki in July of 2026.

Splendid Night View of Mount Inasa

Wind

In most situations in July in Nagasaki, the wind is moderate and gentle. But what you need to keep in mind is that July is also one of the months in a year that is most likely to be hit by typhoons. Therefore, for the sake of safety and better travel experience, it is particularly important to pay close attention to the relevant meteorological reports for Nagasaki.

Nagasaki July Travel Highlight: Nagasaki Port Festival

Every year on the last Saturday and Sunday of July, the Nagasaki Port Festival is held at the main venue, the Nagasaki Seaside Park and the Nagasaki Port. At that time, you will be able to witness a truly spectacular fireworks display and enjoy the magnificent night sky. You can also admire the fireworks in the Mount Inasa and the Glover Garden from unique perspectives.

In addition, Pyron Championships is held in the Nagasaki Port on the last Sunday of July. This is a traditional event in Nagasaki every summer. Players vigorously row the boat on the sea, while people on the shore cheer loudly and enthusiastically. The entire atmosphere is extremely festive and lively.

Fireworks in Nagasaki Port Festival

Packing List for Nagasaki Trip in July

Clothing

In July, the principle of dressing is to wear whatever makes you feel cool. Summer T-shirts and shorts made of cotton or linen are recommended as these fabrics are very breathable. Strappy dress is very cool for female tourists.

Shoes
Sandals are the first choice. However, tourists whose feet tend to sweat are recommended to wear net-surface casual shoes; also remember to bring enough comfortable summer socks for change.

Other Necessities
Don’t forget to bring your rain gear like the umbrella or raincoat.

Summer hat, parasol, and sun protection products with high SPF (Sun Protection Factor) are needed to be packed in your luggage. Cooling arm sleeves and cooling patches are also good as you like.

Tips for Nagasaki Trip in July

Summer vacation usually start in Japan in late July, which means that the number of tourists visiting Nagasaki will increase. Moreover, many people will come for the festival activities at the end of July, and the tourist attractions may become crowded. Visiting Nagasaki during this time, you’d better book your flight tickets, hotel accommodations and attraction tickets beforehand.

If you tend to sweat a lot in hot climate, you are advised to bring some anti-sweating lotion or tissues when going out, to keep your body dry and comfortable.

If you are going to swim, get off the water and immediately rinse your body with clean water and dry it thoroughly. Otherwise, the exposure to the sun and the salt from the seawater can irritate your skin and cause burns.

Sunset at the Train Station of Nagasaki

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7-Day Nagasaki Weather Forecast