The climate of Hiroshima
Hiroshima, located in the western part of the Hokkaido region in
Japan, is classified under the Köppen climate system as Cfa. This demonstrates that it experiences a humid subtropical climate with no dry season. Throughout the year, the weather in Hiroshima is quite dynamic with noticeable variations in different weather components.
By examining the collected data, it becomes clear that the city experiences marked increases and decreases in temperature, humidity, and rainfall over the course of the year. To give a specific illustration, average high temperatures range from 9.7°C (49.5°F) in the coldest months to 32.5°C (90.5°F) in the hottest months. The city also endures a significant amount of rainfall each month, reaching its peak at 259mm (10.2") in the month of
July and its low at 41mm (1.61") in
December. The trend in relative humidity fluctuates as well, with
January and December at the higher end with 69%, while
April sees a low of 63%.
In terms of unique weather patterns, Hiroshima exhibits remarkable features. July is not only the hottest month, with an average high temperature of 32.5°C (90.5°F), but it also is the month with the highest rainfall, at 259mm (10.2"). The city sees minimal snowfall, primarily between December and
February, while the rest of the year typically sees no snow at all.
The best time to visit Hiroshima
Given its climatic variations, the most appropriate time to visit
Hiroshima would be from late
March to early
May or from
September to
November. During these periods, the city experiences mild climates, with average high temperatures from 19.7°C (67.5°F) to 24.1°C (75.4°F) in spring and from 23.4°C (74.1°F) to 29°C (84.2°F) in autumn. Furthermore, these periods feature lower than average rainfall, ensuring comfortable conditions for sightseeing and outdoor activities.
The worst time to visit Hiroshima
The less ideal time to visit
Hiroshima would be from
June to
August. These months experience not only the highest average high temperatures, ranging from 27.2°C (81°F) to 32.5°C (90.5°F), but also the heaviest rainfall, reaching highs of 247mm (9.72") in June to 259mm (10.2") in
July. Additionally, July is typically the most humid month making it less comfortable for outdoor exploration.
Spring weather in Hiroshima
Spring in
Hiroshima, which lasts from
March to
May, is generally warm and pleasant. Temperatures range from 14°C (57.2°F) to 24.1°C (75.4°F), with minimal snowfall. The amount of rainfall is relatively low compared to other seasons, making it comfortable for outdoor activities. The relative humidity level hovers between 63% to 66%, creating a generally comfortable climate.
Summer weather in Hiroshima
Summer, extending from
June to
August, is the hottest and wettest season in
Hiroshima. During this period, temperatures can soar up to 32.5°C (90.5°F). The city sees the highest accumulation of rainfall during these months, reaching a peak of 259mm (10.2") in
July. Furthermore, the humidity level significantly spikes, causing discomfort to those unaccustomed to such conditions.
Autumn weather in Hiroshima
Autumn, from
September to
November, brings a respite from the intense heat and rainfall of summer. During these months,
Hiroshima experiences dropping temperatures, from 29°C (84.2°F) to 17.4°C (63.3°F), and a decrease in rainfall, from 170mm (6.69") to 68mm (2.68"). The relative humidity during this season lies from 68% to 70%, making it rather comfortable for visitors.
Winter weather in Hiroshima
The winter months, from
December to
February, are the coldest with temperatures going down to a low of 1.7°C (35.1°F) in
January. This season sees
Hiroshima experiencing minimal snowfall, peaking at 50mm (1.97") in December. Rainfall is also substantially lower compared to other seasons, lowering to 41mm (1.61") in December. Due to this cold weather, outdoor activities might be slightly difficult during this time.
Weather in January
In
Hiroshima,
January sees frozen soil as snowfall reaches up to 50mm (1.97") over around 9 days. When compared to
February, temperatures ride the low end of the thermometer, amplifying icy conditions. It is particularly chilly in the mornings with frosts a common sight.
Weather in January »Weather in February
February in
Hiroshima is still chilly, though the mercury creeps up a bit from
January. The snowfall lessens with depth reducing to 40mm (1.57"), making it lighter than the previous month. Though it’s warmer, the weather remains wet, creating a moist cold that could settle itself into one's bones.
Weather in February » Weather in March
Heading into
March,
Hiroshima undergoes a significant transition with snowfall decreasing to 10mm (0.39"). March's weather signals the beginning of the transition to spring, moving away from the harsh winter of the previous months.
Weather in March »
Weather in April
In
April, the weather in
Hiroshima enters firmly into spring mode, with a more pleasant climate and no snowfall occurrence. The rising temperatures create a vibrant atmosphere, adding to the vibrance of the city’s iconic cherry blossom season.
Weather in April »Weather in May
May's weather in
Hiroshima sees a noticeable shift towards the warmer side with temperatures beginning to feel like early summer. Rainfall surges to 178mm (7.01"), hinting that the monsoon months are nearing. While the temperatures rise, so does the humidity, making the air feel slightly heavy.
Weather in May » Weather in June
June signals the beginning of the monsoon season in
Hiroshima with the rainfall reaching a high of 247mm (9.72"). The intensity and frequency of rainfall increase from
May, signaling a shift in weather patterns. Despite the heightening rainfall, temperatures continue to rise, creating a humid and warm environment.
Weather in June »
Weather in July
July in
Hiroshima brings the year's highest temperature, soaring to 30.8°C (87.4°F), offering a hot, summer environment during the peak travel season. As the rainfall continues at a high pace, the high humidity intensifies the perceived heat.
Weather in July » Weather in August
Wide fluctuations in
Hiroshima's weather patterns become evident in
August when the rainfall significantly lowers down to 111mm (4.37") from 259mm (10.2") in
July. Despite the reduction in rainfall, temperatures remain high with the warmest sea temperatures of the year crowning August as a preferred time for beachgoers.
Weather in August »Weather in September
Weather in October
October's weather in
Hiroshima is notably cooler than
September with temperatures reflecting strong autumnal vibes. A significant drop in rainfall, down to 88mm (3.46"), makes October a drier month compared to the preceding monsoon months.
Weather in October » Weather in November
With temperatures further dropping to a low of 8.5°C (47.3°F),
November weather in
Hiroshima welcomes late autumn. The rainfall slacks off even more, making it quite a dry month considering Hiroshima's typically wet climate.
Weather in November »Weather in December
December in
Hiroshima indicates the return of winter with temperatures dropping, snowfall reappearing at 30mm (1.18"), and daylight dwindling. The rainfall lessens, reaching the lowest point of the year, echoing typical winter patterns.
Weather in December » [Resources]