Hiroshima in October: Weather, Peace Park, Miyajima and a Two-Day Plan

In October, the streetcars of Hiroshima rattle along the wide boulevards while the light turns softer over the rivers that split the city into islands. Along the banks, people walk and sit in the open air again once the heat of summer has let go.

The Atomic Bomb Dome in Hiroshima in autumn · Illustration

What is the weather like in Hiroshima in October?

October in Hiroshima is mild and mostly pleasant, with warm afternoons, cool evenings and noticeably less rain than in September.

Month	Average high (°F)	Average low (°F)	Precipitation (in)	Days with 1 mm or more of precipitation	Hours of sunshine	Daylight on the 15th
September	84.4	70.0	6.41	8.5	167	12 h 26 min
October	74.7	58.8	4.30	6.2	179	11 h 23 min
November	63.9	48.0	2.73	6.1	153	10 h 24 min

Afternoons sit in the mid-70s, which suits a long day on foot between the park, the riverbanks and the shopping arcades. A light layer is enough in the daytime, and a short-sleeved shirt will often do at midday. The summer stickiness fades, and the air feels drier than it did a month earlier.

Mornings and evenings are where you notice the change. Lows in the upper 50s mean a sweater or a light jacket once the sun goes down, particularly on the riverside paths and on the ferry crossing to Miyajima. Rain falls on a handful of days in the month, and a compact umbrella handles it. Sunshine is generous, so most days offer open skies over the city.

Daylight is shorter than in early autumn, so the evening comes sooner. Plan outdoor sights for the middle of the day and keep dinner for after dark, when the lit-up streets and the riverside restaurants take over.

What to do in Hiroshima in October

October is a walking month in Hiroshima. The city sits along the Seto Inland Sea, a place of wide boulevards and rivers that crisscross it, and the cooler air makes the stretch between the sights pleasant on foot. The maple leaves in the city are still weeks away, since the usual color change at Hiroshima falls around the end of November, so this is a month of clear days rather than of foliage.

Food is a good reason to be here. Hiroshima is known for its okonomiyaki, a savory pancake layered with cabbage, noodles and egg and cooked on a hot griddle in front of you. Oysters from the surrounding waters, grilled or fried, are a local tradition, and the cooler weather suits a hot plate of either one. Momiji manju, the maple-leaf-shaped cakes filled with sweet bean paste, are the sweet to carry back.

Peace Memorial Park and the Museum

On August 6, 1945, Hiroshima became the site of the first atomic bomb attack in history, and the Peace Memorial Park is where the city holds that memory. The park contains many monuments, among them the Children’s Peace Monument and the Hiroshima National Peace Memorial Hall for the Atomic Bomb Victims. The Genbaku Dome, the only structure still standing near the hypocenter, is a UNESCO World Heritage site, and it stands beside the park.

The Peace Memorial Museum conveys the horrors of nuclear weapons through belongings left by victims, A-bombed artifacts and the testimonies of survivors, who are called hibakusha. It is a heavy visit, and the mild October weather helps, since you can walk the park under open sky before or after the exhibits and let the experience settle.

Site	Admission
Hiroshima Peace Memorial Museum (adults)	¥200
Hiroshima Peace Memorial Museum (high school students)	¥100

Miyajima and Itsukushima Shrine

Miyajima Island, in Hiroshima Prefecture, is home to Itsukushima Shrine and its red torii gate standing in the sea. The scene changes with the tide, so the gate can look like it floats on the water or stand over wet sand. The island also has wooded slopes behind the shrine, and the milder October air suits wandering its lanes.

Eat on the island as well. Grilled oysters and momiji manju are the local snacks, and the stalls along the lanes sell both.

Riding the Hiroden streetcars

Hiroshima Electric Railway, known as Hiroden, runs streetcars and buses in and around the city, and its trams come from across Japan and Europe, which earned it the nickname The Moving Streetcar Museum. Riding one is a way to see the boulevards at street level, with the rivers and bridges passing the window.

In October the open air on the platforms is pleasant rather than hot, and a ride makes a good break between the park, the shopping streets and an okonomiyaki lunch. Pick a mismatched old car if one pulls up, since the variety is part of the fun.

A two-day itinerary for Hiroshima in October

Day 1 belongs to the city center. Start in the morning at the Peace Memorial Park, walking past the Children’s Peace Monument and the Genbaku Dome, then step into the Peace Memorial Museum while the day is still cool. Give the museum unhurried time, because it is a lot to take in.

For lunch, find an okonomiyaki counter and watch the cook build the pancake on the griddle. Spend the afternoon on a Hiroden streetcar ride and a stroll along the riverbanks, which suit the mild air. With daylight fading by evening, dinner of grilled oysters or a hot plate in a casual restaurant fits the cooler night.

Day 2 is for Miyajima. Head out in the morning so you have most of the day on the island, walking to Itsukushima Shrine and its red torii gate in the sea, then wandering the lanes behind it. Eat grilled oysters at a stall and pick up momiji manju for the afternoon.

Bring a light layer for the return crossing, since the evening air over the water cools down. If rain turns the day gray, the shrine is still worth seeing under an umbrella, and back in the city the museum and covered shopping arcades offer shelter, so keep the Peace Museum for the wet day if you did not visit it earlier.

Is Hiroshima busy in October?

October is a pleasant season in Hiroshima rather than a peak one for the leaf color, since the maple leaves here turn around the end of November.

What defines the month is the weather. With less rain than September and comfortable temperatures, the park, the streetcars and the shrine island are all easy to enjoy outdoors. The city keeps a steady everyday pace, with people crossing the bridges, eating at the counters and riding the trams to work and school.

Miyajima is the place where you may feel the visitors, as it draws people to the shrine and the lanes around it. The Peace Memorial Park carries a quieter mood, shaped by the subject of the museum and the monuments. Treat each stop at its own rhythm and let the weather set the pace of the day.

What to pack for Hiroshima in October

Pack for warm afternoons, cool evenings and a few showery days, with shoes that handle a full day of walking.

A light jacket or sweater for evenings and the ferry crossing to Miyajima.
Short-sleeved shirts for sunny afternoons in the mid-70s.
A compact umbrella for the few rainy days.
Comfortable walking shoes for the park, the riverbanks and the shrine island lanes.
A small bag for momiji manju and other snacks you pick up.

Good to know before you go

October falls after the wettest part of late summer in Hiroshima, and the rain that does come is lighter and less frequent than in September. Daylight is shorter than a month earlier, so plan outdoor sights for the middle of the day and keep the evening for dinner.

The Peace Memorial Museum charges a modest admission, and the Peace Memorial Park is open for walking among its monuments. Plan the quieter, reflective sights on their own time rather than rushing them between other stops.

Hiroshima in October vs September and November

Moving a month earlier brings September’s heat and heavier rain, with highs in the mid-80s and more wet days. Sightseeing on foot is more tiring, and the evenings stay warm. October trades that for clearer, milder days.

A month later, in November, the air turns properly cool and the days get shorter, with highs in the low 60s. The maple leaves in the city usually change around the end of the month, so late November is the time for color. Rain is lighter still, though sunshine hours drop.

Travelers who want comfortable walking weather and plenty of sun should stay with October. Those who prefer warmth might lean toward September, while those chasing autumn leaves should shift to late November.

Is October a good time to visit Hiroshima?

Yes, October suits travelers who want mild weather for walking the city, the park and the shrine island, with a good amount of sun and fewer rainy days.

It is a fit for anyone planning to spend long hours outdoors, from the Peace Memorial Park to the lanes of Miyajima. Those set on seeing red maple leaves should choose late November instead, and travelers who want hot summer days will find the air cooler than they hoped.

On arrival, begin with the Peace Memorial Park and the museum, which set the context for the rest of the city. What is special about Hiroshima in October is the balance: a city of rivers and boulevards, a shrine gate standing in the sea and plates of oysters and okonomiyaki, all under light that is gentle enough to keep you outside.

Sources

Japan Meteorological Agency (JMA), Normal values 1991-2020, monthly (https://www.data.jma.go.jp/stats/etrn/view/nml_sfc_ym.php?prec_no=67&block_no=47765), station Hiroshima, elevation 4 m, checked October 11, 2026
Computed from the date and the latitude of the place (sunrise equation, solar elevation -0.833 degrees), October 11, 2026
Japan Meteorological Agency, Emergency Warnings (https://www.jma.go.jp/jma/en/Emergency_Warning/ew_index.html), checked October 11, 2026
Japan National Tourism Organization, safety information (https://www.japan.travel/en/japan-safe-travel-information/), checked October 11, 2026
Japan National Tourism Organization, weather and seasons in Japan (https://www.japan.travel/en/plan/weather/), checked October 11, 2026
Japan Meteorological Agency, maple color-change dates 2025-2026 with difference from the 1991-2020 normal (https://www.data.jma.go.jp/sakura/data/phn_014.html), checked October 11, 2026
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