Last updated: August 21, 2025
In Hiroshima, Japan, October ushers in a diverse range of weather patterns characterized by a maximum temperature reaching 28°C (84°F) and a comforting average of 17°C (63°F). The month experiences a minimum temperature dipping to 5°C (41°F), heralding the transition into cooler days. Visitors can expect a fair amount of precipitation, with 164 mm (6.5 in) of rain falling over approximately 11 days, contributing to the region's lush fall foliage. With a humidity level at 79%, the atmosphere often feels rich and refreshing, making October a captivating time to explore Hiroshima's vibrant landscapes.
October in Hiroshima brings a refreshing transition into fall, showcasing delightful temperatures that invite both locals and visitors to enjoy the outdoors. With minimums around 5°C (41°F) and pleasant averages of 17°C (63°F), the city slowly shifts from the sweltering warmth of summer to cooler autumn air. Daytime highs can reach a comfortable 28°C (84°F), making it an ideal time for sightseeing amid the beautiful autumn foliage. This month marks a significant decline from the heights of July and August, characterized by temperature highs nearing 36°C (97°F). As October unfolds, the gradual cooling offers a perfect backdrop for exploring Hiroshima's rich history and stunning landscapes.
In October, Hiroshima experiences a notable decrease in precipitation, with 164 mm (6.5 in) of rain spread over 11 days. This marks a shift from the intense rainfall of the summer months, particularly July and August, which saw totals of 391 mm (15.4 in) and 257 mm (10.1 in), respectively. As autumn settles in, October's rainfall contributes to the overall dip in moisture levels that continue into November, when only 39 mm (1.5 in) is recorded. The city's gradual transition from the wet summer reveals how October stands as a bridge, softening the climate before the dry winter months, while still delivering a significant amount of rain that nourishes the landscape.
As October unfolds in Hiroshima, Japan, the humidity settles at a comfortable 79%, marking a notable decrease from the sweltering summer months. This month's levels reflect a gradual decline from the peak of 95% in July and 93% in August, providing a welcome respite as autumn begins to take hold. While late spring and early summer usher in notably higher humidity, October serves as a transition, bridging the hot, humid days of summer with the drier conditions of late fall and winter. As the air begins to cool, it carries a touch of moisture, making this month feel refreshing, yet still distinctly humid compared to the drier winter months ahead.
In October, Hiroshima experiences a UV Index of 7, categorized as high, with a burn time of 25 minutes. As the year progresses, this marks a noticeable decline from the extreme levels witnessed in summer months like July and August, which peaked at 12. While the autumn sun is less intense, it's essential to remain vigilant, especially with an increase from the September index of 10. This trend reflects a gradual decrease in UV intensity as winter approaches, providing a welcome respite for outdoor enthusiasts. For more details and to stay informed about UV levels throughout the year, visit Hiroshima UV Index.
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As October unfolds in Hiroshima, the city basks in 254 hours of sunshine, a steady continuation of the late summer warmth that peaked in August with 308 hours. This month sees a gentle decline in sunlight, contrasting with the vibrant energy of May and June, which enjoy over 300 hours each. While October’s sunlight may not compete with the summer's brilliance, it still outshines November's 237 hours, making it a delightful transition into the cooler months. The weather remains pleasantly mild, ideal for leisurely strolls, showcasing the beautiful autumn colors that characterize this time of year.
In October, Hiroshima, Japan welcomes a notably higher probability of sunshine, with a 56% chance of clear days that breaks the trend seen in the summer months. This increase marks a shift from the typically overcast conditions prevalent during the hotter season, where July and August dip to just 22% and 25%, respectively. As autumn unfolds, the weather transitions with greater likelihood of sunny spells, making October a delightful time to explore the region's stunning fall foliage. Following closely behind, November maintains a favorable 50% chance of sunshine, solidifying this period as an excellent choice for enjoying Hiroshima's natural beauty while basking in pleasant weather.
As October arrives in Hiroshima, the city enjoys 11 hours of daylight, marking a gentle transition from the longer, sun-soaked days of summer. This month reflects a subtle decline in daylight duration as it follows the peak of summer—where daylight stretches to 14 hours in June and July—before tapering off into the cooler, shorter days of winter. The shifting light pattern from the vibrant days of spring and summer to the crisp autumn evenings signifies a move towards the quieter, more reflective months of the year. With daylight hours decreasing gradually, this transitional period invites locals and visitors alike to embrace the beauty of autumn, as the landscape transforms and the days grow increasingly serene.
As October arrives in Hiroshima, a subtle shift in the breeze marks the transition from summer's warmth to autumn's embrace. With an average wind speed of 2.0 m/s (5 mph), October is relatively calm compared to its neighboring months, reflecting the seasonal lull that follows the gustier summer months of June and July. This gentle wind mirrors the evolving landscape, where trees begin to flaunt their vibrant fall colors. Interestingly, wind speeds have generally decreased since the spring months, suggesting a pattern of tranquility settling over the city as it embraces cooler temperatures and prepares for November's slightly stronger gusts at 2.4 m/s (5 mph). October's whispers of wind invite residents and visitors alike to enjoy the serene beauty of Hiroshima's autumn.
Weather in Hiroshima varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Hiroshima, focusing on differences in temperature, rainfall, humidity, and UV levels.
In October, the weather is generally warmer and more humid, with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 28°C (84°F) and an average of 17°C (63°F). This month experiences considerable rainfall, with 164 mm (6.5 in) over approximately 11 days, contributing to a humidity level of 79%.
Conversely, January brings much colder conditions, featuring temperatures that range from a low of -7°C (20°F) to a high of 14°C (58°F), with an average temperature of just 4°C (39°F). The precipitation is significantly lower, at 54 mm (2.1 in) over 9 days, and humidity remains relatively high at 76%. For more details on January weather in Hiroshima, you can visit Hiroshima weather in January.
October and February present contrasting weather experiences. In October, temperatures range dramatically, with a minimum of 5°C (41°F) and a maximum of 28°C (84°F), creating a mild climate perfect for enjoying outdoor activities. The month is also characterized by higher precipitation, with 164 mm (6.5 in) spread over 11 days, contributing to a humid atmosphere at 79%. On the other hand, February brings cooler conditions, with temperatures dipping as low as -7°C (19°F) and averaging around 5°C (41°F). Precipitation is significantly lower in February, totaling 67 mm (2.6 in) over 9 days and accompanied by a lower humidity of 72%. For a more detailed look at February's weather in Hiroshima, please check Hiroshima weather in February.
October and March showcase contrasting weather patterns. In October, temperatures range from a minimum of 5°C (41°F) to a warm maximum of 28°C (84°F), with an average of 17°C (63°F). The month experiences significant precipitation, totaling 164 mm (6.5 in) over approximately 11 days, leading to a higher humidity level of 79%. In contrast, March features cooler temperatures, starting from a low of -2°C (29°F) and peaking at 22°C (71°F), averaging 9°C (48°F). Though it still experiences 120 mm (4.7 in) of rainfall over about 12 days, the humidity is slightly lower at 69%. For more detailed insights, you can check Hiroshima weather in March.
When comparing the weather in October and April, notable differences emerge. October typically sees temperatures ranging from a minimum of 5°C (41°F) to a maximum of 28°C (84°F), resulting in a warm average of 17°C (63°F). In contrast, April starts off cooler with temperatures dipping as low as -1°C (31°F), reaching an average of 13°C (56°F) and a maximum of 26°C (79°F). In terms of precipitation, October is rainier, averaging 164 mm (6.5 in) over 11 days compared to April's 128 mm (5.0 in) over 9 days. Humidity levels are relatively close, with October at 79% and April at 75%. For more detailed insights about the weather conditions in April, you can visit Hiroshima weather in April.
In comparing the weather of October and May, both months showcase mild temperatures, with October averaging around 17°C (63°F) and May slightly warmer at 18°C (65°F). October experiences a wider temperature range, with highs reaching up to 28°C (84°F), while May can peak at 30°C (86°F). Precipitation is more pronounced in October, totaling 164 mm (6.5 inches) over about 11 days, compared to May’s 121 mm (4.8 inches) over 9 days. Humidity levels are also high in both months, with October at 79% and May at 84%. Visitors can explore detailed insights regarding the conditions in May at Hiroshima weather in May.
When comparing the weather between October and June, notable differences emerge in both temperature and humidity. In October, temperatures range from a minimum of 5°C (41°F) to a maximum of 28°C (84°F), with an average of 17°C (63°F). The month experiences about 164 mm of precipitation over 11 days, contributing to a humidity level of 79%. In contrast, June exhibits warmer temperatures, with a minimum of 11°C (52°F) and a maximum of 30°C (87°F), averaging around 21°C (71°F). Additionally, June sees slightly higher precipitation at 177 mm over 14 days and maintains a higher humidity at 88%. For more detailed information on June weather, you can check out Hiroshima weather in June.
When comparing the weather in October and July, we see notable differences in temperature and precipitation patterns. October offers a cooler climate with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 28°C (84°F), averaging around 17°C (63°F), and has an average humidity of 79%. In contrast, July is significantly warmer, featuring a minimum temperature of 17°C (64°F) and peaking at 35°C (96°F) with an average of 26°C (78°F). It also experiences higher humidity levels at 95% and more rainfall, accumulating 391 mm (15.4 in) over 19 days. For more detailed information, you can refer to Hiroshima weather in July.
In comparing the weather between October and August, significant differences are evident. October experiences milder temperatures, with a minimum of 5°C (41°F) and an average of 17°C (63°F), peaking at 28°C (84°F). In contrast, August is much warmer, with low temperatures starting at 17°C (63°F) and average highs reaching 27°C (81°F), occasionally soaring to 36°C (97°F). Additionally, October sees considerable rainfall, with 164 mm (6.5 in) over about 11 days, while August is even wetter, receiving 257 mm (10.1 in) across 14 days. The humidity is also higher in August at 93%, compared to October’s 79%. For a more detailed look at August weather specifically, you can visit Hiroshima weather in August.
In October, the weather in Hiroshima tends to be cooler and more variable compared to September. While September boasts an average temperature of 23°C (73°F) and can reach highs of 33°C (92°F), October sees temperatures ranging from a cooler minimum of 5°C (41°F) to an average of 17°C (63°F), with highs peaking at 28°C (84°F). Additionally, October experiences less precipitation overall, with 164 mm (6.5 in) falling over 11 days, in contrast to September's 230 mm (9.1 in) over 14 days. The humidity also slightly decreases in October, averaging 79%, compared to September's 84%. For more details on September weather, you can refer to Hiroshima weather in September.
October weather tends to be warmer and wetter compared to November, with average temperatures ranging from 5°C (41°F) to 28°C (84°F) and a total precipitation of 164 mm (6.5 in) over about 11 days. In contrast, November sees cooler temperatures, with a minimum of -1°C (31°F) and a maximum of 23°C (75°F), while experiencing significantly less rainfall at 39 mm (1.5 in) over just 5 days. Additionally, humidity levels remain relatively stable, with October at 79% and November at 76%. For more detailed insights into November weather, you can check out Hiroshima weather in November.
October and December present notably contrasting weather patterns. In October, temperatures range from a mild 5°C (41°F) at night to a warm 28°C (84°F) during the day, with an average of 17°C (63°F). The month is characterized by relatively high humidity at 79% and significant rainfall, totaling 164 mm (6.5 in) over approximately 11 days. In contrast, December sees much cooler temperatures, with a minimum of -2°C (28°F) and a maximum of 20°C (68°F), averaging only 6°C (43°F). Additionally, December experiences less precipitation, totaling 66 mm (2.6 in) across 10 days, and slightly lower humidity at 75%. For a more detailed overview, you can check out Hiroshima weather in December.
October in Hiroshima brings a refreshing shift in weather, marking the transition from the humid warmth of summer to a more temperate atmosphere. With the average temperature settling around a comfortable 17°C, residents and visitors alike can enjoy milder days and cooler nights, making it an ideal time for outdoor activities. While rainfall is still present, with approximately 11 rainy days contributing to a total of 164 mm, the crisp air and vibrant autumn foliage create a stunning backdrop. This contrasts notably with the hotter, more oppressive humidity of the preceding months. For a deeper dive into the city's diverse climate throughout the year, explore Hiroshima Climate.