High Season
Hiroshima's high season generally spans spring (March to May) and autumn (September to November), offering pleasant weather. Spring brings mild temperatures, typically ranging from 10°C to 20°C, and the city bursts into life with cherry blossoms. Upon arrival, you'll notice a bustling atmosphere, with parks like Shukkei-en and Hiroshima Peace Memorial Park filled with visitors enjoying the scenery and hanami (cherry blossom viewing) festivities.
Autumn presents similarly comfortable temperatures, usually between 15°C and 25°C, with lively foliage transforming the city's landscapes. This period sees many local festivals, such as the Hiroshima International Animation Festival, drawing crowds. The city maintains a lively pace, with more outdoor events and cultural activities, making it a popular time for exploring its historical sites and natural beauty.
Low Season
The low season in Hiroshima primarily covers winter (December to February) and summer (June to August). Winter is cool, with average temperatures between 2°C and 10°C, and occasional snowfall, particularly in surrounding mountainous areas. The city adopts a quieter, more subdued pace during these months, and you'll find fewer crowds at major attractions.
Summer, in contrast, is hot and humid, with temperatures often exceeding 30°C, accompanied by heavy rainfall during the monsoon season (June to July). While the heat can be intense, many indoor attractions and air-conditioned spaces offer respite. The Obon festival in August, for instance, sees many locals returning home, affecting the city's usual rhythm. Travel during these times offers a different perspective, with the city feeling less tourist-driven and more focused on local daily life.