Weather in Hiroshima: Climate, Seasons, and Average Monthly Temperature

Cherry blossom trees and small japanese homes in Hiroshima and Miyajima Island


ANUJAK / Getty Images

As is the case across most of the cities and islands that make up Japan, Hiroshima has four distinct seasons, with notable changes in weather, temperature, and nature. However, being a southern city in the Chūgoku region, Hiroshima has slightly higher average temperatures and more sunny days than cities in the north of the country, including the capital city of Tokyo.

Overall, the city of Hiroshima enjoys pleasant weather throughout most of the year, though the summers can get uncomfortably hot and humid, with the rainy season also happening to hit in the early summer months. For this reason, light layers and rain gear should be in your suitcase from the start of June through to the end of September.

With such pleasant yet distinct seasons, Hiroshima is a popular tourist destination throughout the year. With that in mind, here is what you need to know about planning your trip to Hiroshima and the best times of the year for you to visit the city.

Fast Climate Facts

  • Hottest Month: July (80 F / 27 C)
  • Coldest Month: January (40 F / 4 C)
  • Wettest Month: July (10.2 inches)
  • Windiest Month: October (8 mph)
  • Best Month for Swimming: August (81 F / 27 C)

Typhoon Season

June to October in Hiroshima sees an increased number of typhoons so be aware that your travel plans can change last minute during adverse weather. This also means keeping in mind the possibility of local attractions being closed or flights being unable to take off. Delays and cancellations are not unusual. Keep a close eye on the weather reports so that you can adjust accordingly.

Fall in Hiroshima

One of the most pleasant and beautiful seasons to visit Hiroshima, temperatures stay at an average of 70 F (21 C) and the leaf-peeping options are endless. A quick trip to Miyajima Island will treat you to some of Japan’s most famous fall views offering incredible photography opportunities while others head to the dramatic splendor of Sandanky gorge. The famous annual sake festival is also during the fall as well as the Onomichi Betcha Festival, designated an Intangible Folk Cultural Property.

What to pack: The beginning of fall is still quite warm giving way to chillier evenings but as the season moves towards winter, the days start to get colder. It can also get very windy, especially through October, so a jacket, scarf, and some thicker layers will see you through fall in Hiroshima perfectly. 

Summer in Hiroshima

This is the busiest season of the year in Hiroshima, despite the increased rainfall and there are a lot of events going on in the city. However, it is also the hottest and most humid time of year, with highs of 90 F (32 C) being common. That means it is important to dress appropriately and keep out of extreme heat as much as possible.

August 6th—the anniversary of the 1945 bombing by American forces—is an important day in Hiroshima and memorial events take place to recall the tragic devastation and lives lost. The city's most famous memorial event, the toro nagashi lantern festival, takes place every August 6th and the city prays for ongoing peace. Summer is also the season of firework festivals and numerous folk festivals so make sure to keep a close eye on the calendar for any upcoming celebrations.

What to pack: Summer in Hiroshima is hot, humid, and sticky, and, in early summer also very wet. So to be prepared for any eventually and also keep cool, bring lots of light breathable layers, sandals, as well as a thin raincoat or umbrella. Also, make sure to carry a portable fan and water bottle to keep hydrated and cool.

Winter in Hiroshima

While Hiroshima is not as famous a ski destination as areas in northern Japan, there are actually some great winter sports options. Ski resorts are available in the mountains of northern Hiroshima prefecture for skiing and snowboarding. The city lights up through December with the Hiroshima Dreamination illumination festival which is not to be missed. Japan's iconic matsuri festivals are still as enjoyed here in the winter season, just as much as they are in other parts of the country.

The winter is also the season for oysters and the famous Ocho Mikan oranges so food lovers can make the best of fresh seasonal delicacies during this time. Temperatures do drop below freezing so make sure to wrap up warm so you can enjoy the festivities comfortably.

What to pack: Winter in Hiroshima is milder than in other parts of Japan but it still gets chilly, especially with the sea breeze, so don’t forget your winter coat, gloves, hat, and scarf. Pack plenty of layers and a sweater so you can feel comfortable whether you’re indoors or out.

Spring in Hiroshima

Hiroshima is famous for its spring flowers and wisteria trees which come into bloom after the cold winter. The start of spring's flower season beings with a three-day flower festival held during Golden Week that attracts over a million visitors to the city every year. The flower parks of nearby town Sera are also blanketed in multicolored phlox subulata flowers which can only be seen during spring.

Spring is also cherry blossom season and Hiroshima offers plenty of beautiful sakura viewing spots, including Hiroshima Peace Park, Itsukushima Shrine, and Fukuyama Castle, as well as exciting hanami parties to celebrate the coming of the spring. The weather is consistently pleasant with an average of 55 F (13 C) with blue skies and a breeze.

What to pack: Spring is a wonderful time to visit Hiroshima and as things are getting warmer you can leave your winter gear behind and pack your favorite outfits. Don’t forget a light jacket for chillier days and some extra layers or a wrap for the breezy evenings. Towards the end of spring, rainy days are more likely so pack an umbrella to cover all bases.

Average Monthly Temperature, Rainfall, and Daylight Hours

Avg. Temp. Rainfall Daylight Hours
January 40 F / 4 C 1.8 inches 10 hours
February 41 F / 5 C 2.6 inches 10.5 hours
March 50 F / 10 C 4.9 inches 11.5 hours
April 60 F / 16 C 5.5 inches 13 hours
May 68 F / 20 C 7.1 inches 14 hours
June 71 F / 22 C 9.6 inches 14.5 hours 
July 82 F / 28 C 10.2 inches 14.5 hours
August 90 F / 32 C 4.3 inches 14 hours
September 77 F / 25 C 6.7 inches 13 hours
October 66 F / 19 C 3.5 inches 12.5 hours
November 57 F / 14 C 2.8 inches 11 hours
December 45 F / 7 C 1.6 inches 10.5 hours