Hiroshima Weather in June

Weather-wise, June in Hiroshima is a month with frequent rain and relatively high temperatures. Scenery-wise, it is a time when Hiroshima is full of lush greenery. And, crowds-wise, it is a quiet month without many tourists.
See also: Japan Weather in June

Humid Rainy Season Begins

From early to mid-June each year, Hiroshima enters its rainy season, bringing frequent rainfall. Specifically, June ranks among the wettest months of the year, with an average precipitation of 237 mm and approximately 12 rainy days. Light, moderate, or even heavy rain is possible. The rain typically occurs as brief showers, but you should know that sometimes, it’s possible that rain starts and stops multiple times throughout the day, causing it to persist intermittently all day long. In short, outdoor activities during a trip to Hiroshima this month will likely be affected by precipitation to some degree.

Additionally, high rainfall results in high humidity. The average humidity this month reaches 72%.

See also: Everything You Need to Know about Rainy Season in Japan

Miyajima Island on Rainy Days

Relatively High Temperature

In June, Hiroshima enters summer and the temperatures climb gradually. Overall, combined with the frequent rain, the weather is not too hot yet, but a bit muggy. 

Specifically, on cloudy and rainy days, which make up most of this month, daily highs typically hover around 25 degrees Celsius (77 degrees Fahrenheit), with the maximum around 29°C (84°F) and the minimum potentially dropping to about 17°C (63°F). This means daytime hours on these days are generally warm or cool but not hot. Daily lows generally range between 16 and 24°C (61-75°F), a quite cool level. 

On sunny days, particularly those during the latter half of the month, daily highs typically climb to around 30°C (86°F), with peaks reaching approximately 33°C (91°F). Combined with high humidity, these days may feel somewhat sticky and muggy. Daily lows on sunny days usually hover around 25°C (77°F), offering a cool respite.

Hiroshima Castle in Hot June

Long Daylight Hours & Sunshine Hours

Sunrise Time: 4:57-5:01
Sunset Time: 19:17-19:26

June boasts the longest daylight hours throughout the year, which averages 14.2-14.3 hours. This makes it possible for you to still enjoy a rich tour even on days with 1-2 hours of brief rain. The sunshine hours, on the other hand, are not long enough in June because of the many rainy moments: on average, they are about 5 hours per day. However, don’t underestimate the damage sunlight can do to your skin, since the UV index can peak at 10 this month.

Sunny Days with Strong UV Rays

Is June a Suitable Time to Visit Hiroshima?

Actually, that depends on your preferences.

If you prefer fine weather and love outdoor activities, June is not a good month to travel to Hiroshima. As mentioned above, the weather of Hiroshima, which is both rainy and sticky, is not very favorable for long-period outdoor activities.

If you don’t mind the rain and prefer quieter surroundings or want to have a budget-friendly tour, June is an excellent choice. It is the off-season for tourism. Attractions see fewer visitors, allowing you to experience the solemnity of Hiroshima Peace Memorial Park and the beauty of Itsukushima Shrine in tranquility. At the same time, you can spend less on hotel reservations and airfare.

Hot but Lush and Quiet June

What to Bring When Visiting Hiroshima in June

 Clothes: In warm or hot daytime of June, you can wear T-shirts, short-shirts, skirts, shorts, light pants, and dresses. On this basis, you are also advised to bring a long-sleeve T-shirt or a thin jacket to cope with the cool nights and some cool rainy days. Since the climate of Hiroshima is humid and it takes a long time for washed clothes to dry, it’s recommended to bring more clothes for changes.

 Shoes: Sandals and water shoes are recommended, which are convenient and quick to get dry on rainy days. Besides, sneakers or walking shoes are also needed when you plan to walk around.

 Others: Since June belongs to the rainy season, rain gear like umbrellas and raincoats are better to be brought at any time. Besides, on sunny days, you need sun protective gear, including sunscreen, sunglasses, and a sunhat, because the UV rays are strong. To prevent insect and mosquito bites, insect repellents are needed.

Tips to Gain a Better Travel Experience in Hiroshima in June

Although the temperatures this month are not particularly high, midday can still feel quite uncomfortable. This means that it’s best to visit outdoor activities during cooler times, like the morning and late afternoon, and indoor sightseeing or resting is relatively more suitable for midday. Additionally, when visiting Hiroshima this month, you are highly likely to encounter rainy days. This requires you to: first, constantly monitor the weather forecast; second, select indoor attractions as your backup options in advance. For this purpose, you might want to know which worthwhile indoor attractions Hiroshima has to offer:

1. Hiroshima Peace Memorial Museum
2. Three Art Museums in Hiroshima: Hiroshima Museum of Art, showing impressionists’ works mainly; Hiroshima Prefectural Museum of Art, showing Hiroshima-related works, Japanese and Asian crafts; and Hiroshima City Museum of Contemporary Art, showing works about the past and modern Hiroshima. 
3. Hondori Street: With a roof on the top of the street, it is lined with nearly 200 shops, including snack shops, clothing stores, toy stores, home goods stores, as well as shops selling local products of Hiroshima. 

Hiroshima Hondori Street

Special Activities / Views in Hiroshima in June

1. Tokasan Festival

This is one of Hiroshima’s three major festivals, a celebration praying for bountiful harvests while welcoming early summer. It is held annually from the first Friday to Sunday in June near Chuo-dori Shopping Street, and the corresponding dates for 2026 are June 5-7. The festival’s main highlight is the sight of men and women filling the streets in vibrant yukata. If you are interested, you can also rent one yourself. Additionally, in the evenings, Chuo-dori Shopping Street comes alive with food stalls and captivating dance and taiko drum performances.

Hydrangeas in Hiroshima

2. Beautiful Hydrangeas in Various Attractions

During your Hiroshima tour in June, in addition to cultural sites like the Atomic Bomb Dome and Hiroshima Peace Memorial Park, you won’t want to miss experiencing summer through the natural landscapes. Beyond the ubiquitous deep green foliage, this month also boasts beautiful hydrangeas. You will have the chance to see these lovely and vibrant blooms while visiting attractions like Miyajima Island, Shukkeien Garden, Enryu-ji Temple, Fukusen-ji Temple, and Hiroshima City Botanical Garden.

Hiroshima Weather by Month