Hiroshima Weather in October

In October, Hiroshima is in the most comfortable period of autumn: the temperature is mild and the weather is relatively sunny, making it one of the best months of the year to visit Hiroshima. Besides, leaves begin to turn red in late October.

Overall Warm to Cool Temperature

Cool and Cozy October

Temperatures of Hiroshima in October show a significant dropping trend. In the first half month, the daytime is warm at 25-30°C (75-86°F), and nighttime is cool at around 20°C (68°F). Then, in the second half month, you will feel cool the whole day: the daily high temperatures are in a range of 20-25°C (68-75°F), and the daily low is around 15°C (59°F). In some years, the daily temperatures may be low at around 10-15°C (50-59°F) on the last few days of the month.

The temperature difference is large between day and night sometimes, at 5-10°C (9-18°F). So, add clothes in time to keep warm in the morning and evening.

Not Much Rain

The city experiences about 120 mm of rainfall on average in October. The risk of encountering rain during your trip is not very high, with an average of 7 rainy days. Moreover, the rain this month is usually low in intensity and short in duration. So, you can just ignore the influence of rain on sightseeing when considering whether to visit Hiroshima in October.

People tend to feel comfortable with an average humidity of 64%.

Hiroshima Castle in Sunny October

Daylight Hours and Sunshine Hours

Some attractions of Hiroshima begin to shorten their daylight hours in October, when the sunrise time gets later from 06:04 to 06:29 and the sunset time advances from 17:54 to 17:17. For example, with October 15 as the cutoff date, Itsukushima Shrine’s opening hours for the first and second halves of the month are 06:30-18:00 and 06:30-17:30, respectively. Besides, the daytime shortens from 11.5 to 10.5 this month, also meaning that you need to arrange a more compact itinerary.

The weather of Hiroshima in October is sunny most of the time, and you can get nearly 6 sunshine hours per day on average. The UV index is at a moderate level of 6, and basic sun-protection items are still recommended to bring.

Why Visit Hiroshima in October?

October is one of the best months to visit Hiroshima, and a trip this month can provide you with many delightful experiences.

1. The mild temperature, mostly sunny weather, and moderate humidity will make all your outdoor explorations comfortable and pleasant.
2. There are not many tourists visiting Hiroshima in October. So, you can gain a quiet and leisurely journey.
3. You don’t need to worry about spending too much on hotels and air tickets in this shoulder tourist season.
4. Leaves begin to change their color in late October, providing you with a beautiful and colorful view.

Strolling around Hiroshima Peace Memorial Park

What to Wear to Visit Hiroshima in October

Daytime: Girls can wear long summer dresses plus thin knitwear or blouses; or simply long-sleeve dresses. Boys can wear long-sleeve T-shirts or shirts together with light pants. If you are sensitive to heat, you could even wear T-shirts or short shirts in early October.

Night: Because of the large temperature difference between day and night, you need to wear thicker clothes at night. Specifically, you are recommended to put on a denial jacket or a thin trench coat.

Shoes: October is a month when Hiroshima climate is perfect for outdoor activities, so walking shoes and sneakers are recommended. A folding umbrella is recommended to bring just in case.

Other Items: Please bring sunglasses and hats for basic sun protection. You can also prepare sunscreen, which will be needed when visiting Miyajima Island. Besides, pack an umbrella in your bag.

Top Things to Do in Hiroshima in October

1. Admire Itsukushima Underwater Fireworks Festival

In October with cozy temperatures, you can have an in-depth tour in Miyajima Island. Specially, you can visit the famous Itsukushima Shrine and admire the Otorii gate in the sea; hike on the Island and play with the lovely deer, and take the ropeway to the top of Mt. Misen and have a bird’s eye view of the Seto Inland Sea.

In addition, you are highly recommended to see the Itsukushima Underwater Fireworks Festival. During the festival held in mid-October, there are about 5,000 fireworks that burst over the sea, illuminating the giant Otorii gate and the sea. More exciting, some of them will be “underwater fireworks” launched directly from the water surface.

2. See Early Autumn View

In late October, early autumn scenery can be seen in Hiroshima. At this time, attractions like Shukkeien Garden, Hiroshima Peace Memorial Park, Hiroshima Castle, and Hijiyama Park will all show some orange or red leaves.

Shukkeien Garden in Late October

3. Go to the Saijo Sake Festival

If you have ample time and are interested in sake, a traditional Japanese rice wine, you are recommended to go to the Saijo Sake Festival held in mid-October in Saijo, one of the capitals of sake that is not far away from Hiroshima City. You can taste various kinds of sake and foods, and enjoy local performances.

4. Enjoy Night View and Rich Night Life

Hiroshima in October has early sunsets but cozy nights, so you can arrange some nighttime visiting in your tour to gain a richer experience. For example, the Atomic Bomb Dome, Hiroshima Peace Memorial Park, and Hiroshima Castle are illuminated at night, providing quieter scenes for you compared with the daytime. Besides, Nagarekawa and Ekinishi are recommended places to experience the nightlife of Hiroshima, which boasts many restaurants and izakaya, Japanese pubs.

Tips for Visiting Hiroshima in October

1. As a reminder, late October only provides a small scale of autumn leaves, and their peak season in Hiroshima is in late November.
2. There is a 3-day public holiday from October 10 to 12 in 2026, and you may want to avoid this a bit crowded period.