Hiroshima Weather

Overall, with a subtropical monsoon climate, Hiroshima has four distinct seasons: mild and pleasant spring from March to May and autumn from September to November, hot and rainy summer, and cold and dry winter with continuous sunny days. Typhoons may occur occasionally from August to October. The northern part of Hiroshima is surrounded by mountains, having more precipitation and comparatively lower temperatures, while the southern part faces the Seto Inland Sea, having less rain and more sunshine.

Temperature

Hiroshima experiences significant temperature variations throughout the year, but the overall weather is relatively mild. Typically, daily highs range between 0 and 35 degrees Celsius (32-95 degrees Fahrenheit), while lows fluctuate between -3 and 27°C (27-81°F).

Specifically, January and February are quite cold, with daytime temperatures hovering around 10°C (50°F) and nighttime temperatures occasionally dropping below freezing. March, marking the start of spring, sees steady temperature rises; and April and May feature comfortable weather. June brings the start of muggy conditions, and July and August are the hottest months throughout the year, with the temperatures frequently exceeding 35°C (95°F). During these two months, nights also tend to be a bit hot. September experiences gradually cooling temperatures as autumn sets in. October and November offer pleasant temperatures. December may be a bit chilly, though temperatures remain generally mild with rare occurrences of extreme cold.

 Hottest Month: August, with daily highs typically around 35°C (95°F), occasionally reaching 38°C (100°F).
 Coldest Month: January, featuring daily lows around 0°C (32°F) and highs around 10°C (50°F), with the lowest recorded temperature around -3°C (22°F).

Precipitation

The average annual precipitation is about 1,690 mm in Hiroshima, with 100 to 120 rainy days in total. Besides, precipitation levels in the northern mountainous areas are slightly higher compared with the urban area. Generally speaking, the precipitation in Hiroshima is concentrated mainly in summer and autumn, due to the influence of the plum rainy season and typhoons. Winter is the driest time of the year, when rain and snow occur just occasionally. Then:

When Is the Plum Rainy Season in Hiroshima?

Hiroshima typically experiences its rainy season from early June to mid-July, which also marks the city’s rainiest months of the year. On average, precipitation during these two months reaches 237 mm and 279 mm, respectively, with about 12-13 rainy days per month. During the rainy season, the city usually sees both persistent rain and frequent downpours, resulting in poor outdoor visibility and inconveniences for travel. Additionally, the high rainfall leads to extremely high humidity during this period. Combined with the high temperatures mentioned earlier, this creates an exceptionally muggy and oppressive atmosphere.

Rainy Season of Hiroshima

When Is the Typhoon Season in Hiroshima?

Hiroshima’s typhoon season typically runs from late August to early October, with September being the month when the city is most likely to be hit by a typhoon. What does typhoon weather bring? Typically, it’s strong winds and intense rainfall. During such terrible weather conditions, some outdoor attractions may close temporarily, and public transportation may be suspended. In extreme cases, you may need to stay in your hotels for safety.

Best Time to Visit Hiroshima 

The best time to visit Hiroshima is spring and autumn, from March to May and from September to November respectively. Spring is warm with relatively low precipitation. Besides, it is the season for appreciating cherry blossoms and various other flowers. As for autumn, it has crisp air, cool temperatures, and stunning autumn leaves. 

• Read more: Best Time to Visit Japan; Japan Weather; Japan Cherry Blossom Dates Forecast in 2026; Japan Fall Foliage Forecast in 2026

Cherry Blossom in Hiroshima

Hiroshima Autumn View

Hiroshima Seasons - Weather & Travel Tips

Spring: March - May 

Weather: mild and pleasant, with some rain
Temperature: 5-26℃ (41-79℉)
Precipitation per month on average: 129-182 mm over 10 rainy days

From March to May, the daily low and high temperatures of the city rise from 5 to 20℃ (41-68℉) and 10 to 25℃ (50-75℉), respectively. In other words, except for a bit cold early March, other times of spring have favorable and suitable temperatures for outdoor activities. It should be noticed that the temperature difference between the daytime and evening is large sometimes. Then, Hiroshima sees moderate rainfall that falls mainly in the form of light rain or showers. Therefore, though the rain will not cause much trouble to your trip, you are still recommended to bring rain gear.

 What to Pack: In the daytime, clothes like thin knitwear, thin sweaters, hoodies, and jeans can be worn; while at night, when the temperature goes down, denim jackets should be put on. As for shoes, sneakers and walking shoes are needed. Besides, remember to bring umbrellas or raincoats.

 Travel Recommendation and Tips: 
1. From the second half of March, the cherry blossoms begin to bloom in Hiroshima. Then, from late March to early April, these lovely pink flowers welcome their best visiting time. Famous attractions like Hiroshima Peace Memorial Park, Hijiyama Park, Hiroshima Castle, and Miyajima Island will all be full of Sakura during this period.
2. In early May 2026, the annual Hiroshima Flower Festival will be held, when you can see the parade and various floral decorations.

Pink Sakura in Spring

Lush View of Hiroshima Castle

Summer: June - August

Weather: stuffy and rainy
Temperature: 20-35℃ (68-95℉)
Precipitation per month on average: 155-280 mm over 9-13 rainy days

When entering summer, Hiroshima will be hit by the heat gradually. You can still enjoy several warm but not hot days at the beginning of June, when the daily high is around 25℃ (75℉). Then, since the second half of the month, the daily high usually ranges from 30-35℃ (86-95℉). Even the daily low increases from 20 to 30℃ (68-90℉) in summer. Besides, the rainy season falls in June and July. In these two months, Hiroshima usually experiences quite frequent rain and gray skies. The high rainfall will not only make outdoor activities inconvenient, but also lead to high humidity and muggy weather. As for August, it marks the beginning of the typhoon season and thus also has relatively high rainfall.

 What to Pack: Clothes like breathable T-shirts, short shirts, skirts, shorts, dresses, and light pants can be packed if you plan to visit Hiroshima in summer. Besides, be sure to take sun protection items and rain gear.

 Travel Recommendation and Tips: 
1. Many Fireworks Festivals, like Minato Dream Fireworks Festival, and summer festivals, like Miyajima Summer Festival, are usually held in July and August.
2. Remember to check the weather forecast frequently, especially in the extremely rainy June and July. In addition, you are recommended to avoid scheduling outdoor activities for the midday hours, as the weather is unbearably hot during this period.

Hot Summer

Autumn: September - November

Weather: cool, with moderate rainfall
Temperature: 6-30℃ (43-86℉)
Precipitation per month on average: 75-167 mm over 7-10 rainy days

Autumn begins in September and ends in November. The weather cools down and becomes pleasant for outings and traveling: the temperatures range from about 20-30℃ (68-86℉), 15-25℃ (59-77℉), and 10-20℃ (50-68℉), respectively, in these three months. As for the rainfall, it decreases and comes to a moderate stage. As a result, sunny days occur more frequently. However, be mindful that typhoons may hit the city from September to October, especially in September, bringing consistent and heavy rain. 

 What to Pack: At the beginning of autumn, clothes like long-sleeve T-shirts, blouses, thin knitwear, and jeans are suitable to wear. However, by the end of Autumn, when the temperature is lower, leather jackets, sweaters, thick sweat pants and other thicker clothes need to be put on.

 Travel Recommendation and Tips: 
1. From late October to November, leaves in various parts of Hiroshima turn red or yellow, providing beautiful autumn scenery for visitors. Recommended admiring spots include Momijidani Park of Miyajima Island, Shukkeien Garden, Hiroshima Castle, and Taishakukyo Gorge.
2. Autumn is the season for fatty bonito and saury, do not forget to have a taste.

Shukkeien Garde in Autumn

Hiroshima Deer in Autumn

Winter: December - February

Temperature: 0-15℃ (32-59℉)
Precipitation per month on average: 58-75 mm over 7-8 rainy days

Stepping into winter, the weather of Hiroshima gets colder and colder, with occasional rain or snow. In early December, the weather is only slightly chilly, with temperatures still reaching 5-15℃ (41-59℉). However, temperatures continue to drop, reaching their annual lowest in January at around 0-10℃ (32-50℉). In January 2025, the coldest day recorded temperatures of -3-2℃ (27-36℉). Temperatures begin to rise again in late February. Winter has the lowest precipitation compared with other seasons, and you can expect many sunny days if you plan to visit Hiroshima during this period. Besides, you may want to know that rain is the main form of precipitation in winter, and snow only falls in occasional years.

 What to Pack: To protect yourself from coldness, clothes like wool overcoats, downcoats and winter pants are needed. Besides, on the coldest days, you may need to put on a hat and scarf. Choose thick enough sneakers or boots.

 Travel Recommendation and Tips: 
1. There are many hot springs in Hiroshima, where you can relax in the cold winter.
2. Daylight hours are short in winter, so you need to make compact travel plans. Besides, many attractions, like the Hiroshima Peace Memorial Museum, shorten their opening hours accordingly, requiring you to check the related information in advance. 

3. Winter is the best time to taste Hiroshima’s representative seafood, oysters.

Quiet Hiroshima in Winter