Nagasaki Weather in June

Season: Summer

Key points:
1. The weather in June of Nagasaki is relatively hot.
2. Rainy season begins in early time of the month.
3. You are advised to wear clothes like the summer T-shirt and shorts and bring rain gear.

4. Colorful hydrangeas are still in blossom in early June in places such as the Kofukuji Temple and the Meganebashi Bridge.

Landscape by the Sea of Nagasaki

Rainiest Month of the Year

It is the rainy season from early June to mid-July in Nagasaki, so rainfalls occur with high frequency throughout June. About 19 days of the month have rainfalls and the average monthly precipitation reaches 450 mm, which ranks the top among all the months of the year in Nagasaki. To be more specific, there are 3-4 days of heavy rain in June, with daily precipitation of over 60 mm while in other time, it is more commonly moderate and light rainfalls. Whatever, rain gear is one of the necessities in June in Nagasaki.

Because of the high rainfall, it is understandable that the weather of Nagasaki in June is rather humid, with the average humidity of about 83%.

Rainy Weather of Nagasaki in June

Relatively High Temperature

Entering summer season, the temperature of Nagasaki in June is relatively high. About half of the month has the high temperature above 26 degrees Celsius (78.8 degrees Fahrenheit) during the day. There is also historical data which suggests that the highest temperature in the second half of June reached 31-32℃ (87.8-89.6℉). The minimum temperature is also gradually increasing as time goes on from around 16℃ (61℉) in early June to around 22℃ (72℉) in late June.

The monthly average sea temperature in June in Nagasaki is 21-22.4℃ (69.8-72.32℉), which is not at the most comfortable level for swimming especially for tourists who are sensitive to coldness.

Wind

Gentle breeze and moderate breeze are prevalent in the first half of June, and strong winds are more possible to strike Nagasaki in the second half of the month.

Daylight Hours & Sunshine Hours

The time of sunrise in June is the earliest throughout the year in Nagasaki, at around 5:12. Sunset is at a late time around 19:28. Therefore, Nagasaki has about 14.3 hours of daylight in June on average.

Given that June is the month with the most clouds and the largest precipitation throughout the year, the sunlight hours decrease accordingly, about 4 hours per day averagely.

However, the ultraviolet rays during sunny moments should not be underestimated. With the UV index up to 10, you need to take care of your skin if you plan to visit Nagasaki in June of 2026. The best solution is to wear clothes with sun-protective properties.

Tourist Rests under the Shade of Trees

Is There a Typhoon in Nagasaki in June?

The typhoon season in Nagasaki usually begins in June and lasts till October. As a rule, the typhoon is not often in June, just rare cases.

Is June Recommended for Traveling in Nagasaki?

It depends. There are no official holidays or activities in June in Nagasaki, so one advantage for traveling in Nagasaki in June is that the city is not crowded. But take the dissatisfactory weather condition of the city into consideration, it is not recommended for you to visit Nagasaki in the middle and late periods of this month.

Early June is a better time because the temperature usually fluctuates between 22-26℃ (71.6-78.8℉) and precipitation is less frequent during this time. Besides, there is beautiful scenery that adds vibrant colors to Nagasaki. You can admire a variety of hydrangeas which are in full bloom in the early period of the month in many places like the Kofukuji Temple and the streets surrounding the Meganebashi Bridge.

Food Street of Nagasaki

Atomic Bomb Hypocenter after the Rain

Packing Recommendations for Nagasaki Trip in June

Clothing

Considering the overall hot weather during June, the principle of packing your clothes is to make sure they are both thin and light. Summer T-shirts and shorts are the most common choices. Female tourists can bring summer dresses or skirts as you like.

Shoes
Shoes, by the same token, are better to be well-ventilated. Canvas shoes with ventilation holes or casual shoes with mesh surfaces are recommended. Sandals are also good.

Other Necessities
Rain gears like the umbrella or raincoat are quite necessary in the rainy season.

To protect you against the intense sun in sunny days, it is advised to bring some chemical sun-protective products such as the sunscreen cream or sunscreen lotion with high SPF (Sun Protection Factor), whose sun protection effect is better. Or you can choose physical sun protection method, that is, wear long-sleeved shirts and long pants with good ventilation properties. Of course, wearing a sun-protective suit is better. Besides, a hat with a wide brim, such as the straw hat, can effectively shield your face from the sun. Plus, you can bring a parasol, which can protect you from both the sun and rain.

Friendly Tips for Nagasaki Trip in June

You’d better not bring the sunscreen spray for the sake of safety because there are strict restrictions if you are going to visit Nagasaki by plane.

If you want to walk barefoot on the beach, you should be extra careful to avoid sharp stones or other objects hidden beneath the sand, to prevent your feet from getting hurt.