Last updated: August 21, 2025
In December, Hiroshima experiences a refreshing transition into winter, characterized by an average temperature of 6°C (43°F), with highs reaching 20°C (68°F) and occasional lows dropping to -2°C (28°F). The month sees about 66 mm (2.6 in) of precipitation spread across 10 days, contributing to the region's 75% humidity. This combination of temperate weather and moisture creates a unique atmosphere, setting the stage for the city's picturesque winter landscape and vibrant cultural experiences.
In December, Hiroshima experiences a transition into winter, with temperatures reflecting a noticeable dip compared to the milder autumn months. The average temperature settles around 6°C (43°F), while nighttime lows can drop to -2°C (28°F). Despite this chill, daytime highs can reach a comfortable 20°C (68°F), offering a pleasant contrast to the crisp evenings. This cool weather marks a clear shift from the warmer temperatures of previous months, and while December may signal the onset of winter, it still provides moments of warmth that encourage outdoor exploration. As the month progresses, residents and visitors alike can enjoy the scenery adorned with seasonal charm, making Hiroshima a uniquely inviting destination during this time of year.
In December, Hiroshima experiences moderate precipitation, with an average of 66 mm (2.6 in) falling over approximately 10 days. This marks a slight decrease from the wetter months of late summer and early fall, as the city transitions into winter. The precipitation amount is notably higher than November's mere 39 mm (1.5 in), yet still reflects a more stable, predictable weather pattern typical of winter. With temperatures dropping, December's rainfall often comes as light drizzles rather than heavy downpours, allowing the city to maintain its vibrant scenery amidst the seasonal change. This month bridges the gap to the dry chill of January, setting the stage for the quieter precipitation levels typically observed in the new year.
December marks a transition in humidity levels in Hiroshima, Japan, with an average of 75%, a slight decrease from the high summer months. The year begins with a notable 76% in January, reflecting a gradual decline as spring approaches, reaching its lowest in March at 69%. As temperatures rise in late spring and summer, humidity soars, peaking at an impressive 95% in July. However, as the year winds down, humidity levels stabilize, with December bringing a refreshing breath at 75%. This pattern highlights a humid climate overall, with significant spikes during the warmer months, before tapering off into the cooler winter season.
In December, Hiroshima experiences a notable shift in its UV Index, dropping back to 4, which falls into the moderate exposure category. This is a reprieve after the extreme levels seen in the summer months, where the UV Index peaked at 12, necessitating much shorter burn times of just 10 minutes. As the year winds down, residents and visitors can enjoy a more leisurely 30-minute sun exposure without the imminent risk of sunburn. The trend throughout the year highlights the dramatic fluctuations in UV intensity, with spring and summer months demanding heightened caution. To stay informed and prepared, you can check the detailed data at Hiroshima UV Index.
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In Hiroshima, December ushers in a charming blend of winter light, as the city basks in 220 hours of sunshine. This month reflects a gradual decline from the peak brightness of summer, where August dazzled with 308 hours of sunlight, showcasing the region's vibrant energy. As the year winds down, December's glow reminds us of the transition into cooler seasons, yet it still offers more sun than the darker months of January and November. The consistent availability of sunshine throughout the year, particularly evident from March to May, when the hours surpass an impressive 270 hours, creates a sense of warmth that lingers even as temperatures drop. Thus, December serves as a gentle reminder of Hiroshima's resilient spirit, illuminating the beauty of seasonal shifts.
In December, Hiroshima experiences a 50% chance of sunny weather, which places it on par with the preceding month of November, known for its variable skies. This trend indicates a mild yet fluctuating winter climate, where the likelihood of sunshine remains stable as the year comes to a close. Interestingly, compared to the summer months—such as July and August, which boast only a 22% and 25% chance of sun respectively—December offers a surprising uplift in brightness. As daylight diminishes, the chance of clear skies in December provides a welcome flicker of optimism for those seeking outdoor enjoyment in the heart of winter.
As December rolls in, Hiroshima experiences a noticeable shift in daylight duration, with daylight decreasing to just 9 hours. This marks the lowest point of the year, following a gradual decline from the peak of 14 hours in June and July. The transition from the vibrant 13 hours of daylight in May and August signals the impending winter, as daylight steadily wanes through the autumn months. With each passing month, the shortening days invite a cozy atmosphere, encouraging residents and visitors alike to savor the warmth of indoor gatherings while the sun's presence dwindles. As the year closes, the subtle rhythms of daylight remind us of the cyclical nature of time, hinting at the longer days that await in the spring.
As December rolls into Hiroshima, the winds pick up slightly, averaging 3.0 m/s (7 mph), which is on par with February and stands out amidst the generally calmer months preceding it. The trend reveals a subtle increase in wind speed during the winter months, contrasting sharply with the lull of June through October, where the breezes barely reach 2.0 m/s. This seasonal uptick makes December a refreshing time to experience the city, as the cool air whisks through the streets, offering a brisk backdrop to festive winter scenery. The winds, while gentle overall throughout the year, gain an invigorating zest at this time, setting the stage for a cozy yet vibrant month in Hiroshima.
Weather in Hiroshima varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Hiroshima, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January exhibit notable differences in weather patterns. In December, the temperatures range from a minimum of -2°C (28°F) to a maximum of 20°C (68°F), with an average of 6°C (43°F) and a total precipitation of 66 mm (2.6 in) over about 10 days. Conversely, January typically experiences colder conditions, with temperatures dropping to a minimum of -7°C (20°F) and peaking at 14°C (58°F), averaging around 4°C (39°F). Additionally, January sees slightly less precipitation, totaling 54 mm (2.1 in) over approximately 9 days, while humidity remains consistent at 76%. For more detailed information, you can check Hiroshima weather in January.
In December, the weather features a broader temperature range with a minimum of -2°C (28°F) and an average of 6°C (43°F), reaching a maximum of 20°C (68°F). The month experiences around 66 mm (2.6 in) of precipitation over approximately 10 days, with humidity levels averaging 75%. In contrast, February presents slightly cooler conditions, with a minimum temperature of -7°C (19°F) and an average of 5°C (41°F), while maintaining a similar maximum temperature of 20°C (69°F). Precipitation remains comparable at 67 mm (2.6 in) but occurs over just 9 days, and humidity dips slightly to 72%. For more detailed insights into February's climate, you can check Hiroshima weather in February.
In December, temperatures in Hiroshima typically range from a minimum of -2°C (28°F) to a maximum of 20°C (68°F), with an average of 6°C (43°F). The month experiences around 66 mm (2.6 in) of precipitation over about 10 days, accompanied by a humidity level of 75%. In contrast, March presents slightly warmer conditions, with temperatures ranging from -2°C (29°F) to 22°C (71°F) and an average of 9°C (48°F). Precipitation increases to 120 mm (4.7 in) over approximately 12 days, while humidity drops to 69%. This comparison highlights how March brings a transition towards warmer weather, though it also tends to be wetter. For more details on the monthly conditions, you can visit Hiroshima weather in March.
December and April present distinct weather contrasts. In December, temperatures vary from a chilly -2°C (28°F) at night to a mild average of 6°C (43°F) during the day, peaking at 20°C (68°F). The month sees about 66 mm (2.6 in) of precipitation spread over 10 days, with humidity levels consistently at 75%. In contrast, April showcases a broader temperature range, with a minimum of -1°C (31°F), an average of 13°C (56°F), and a maximum reaching 26°C (79°F). This month is notably wetter, receiving 128 mm (5.0 in) of rain over just 9 days, while maintaining the same humidity level of 75%. For more details on the weather in April, you can check Hiroshima weather in April.
December and May present contrasting weather conditions. In December, temperatures range from a chilly -2°C (28°F) at night to a mild 20°C (68°F) during the day, averaging around 6°C (43°F). The month sees about 66 mm (2.6 in) of precipitation over 10 days, with humidity levels at 75%, creating a crisp atmosphere. In contrast, May enjoys warmer temperatures with a minimum of 5°C (42°F) and a maximum of 30°C (86°F), averaging 18°C (65°F). Although it is slightly more humid at 84%, May experiences higher precipitation levels of 121 mm (4.8 in), spread over just 9 days. For more detailed insights on weather trends, you can check Hiroshima weather in May.
December weather features cooler temperatures, with a minimum of -2°C (28°F) and an average of 6°C (43°F), while highs can reach up to 20°C (68°F). This month experiences 66 mm (2.6 in) of precipitation over about 10 days, accompanied by a moderate humidity level of 75%. In contrast, June brings much warmer conditions, with temperatures ranging from a minimum of 11°C (52°F) to a maximum of 30°C (87°F), and an average of 21°C (71°F). The month sees significantly higher precipitation totaling 177 mm (7.0 in) spread across 14 days, along with increased humidity at 88%. For a detailed look at June conditions, you can visit Hiroshima weather in June.
When comparing December and July weather, the differences are striking. December sees much cooler temperatures, with average highs around 6°C (43°F) and lows dipping to -2°C (28°F), while July boasts average highs of 26°C (78°F) and lows of 17°C (64°F). Precipitation also varies significantly; December experiences about 66 mm (2.6 in) of rain over 10 days, whereas July is much wetter, receiving approximately 391 mm (15.4 in) across 19 days. Additionally, July's humidity reaches a high of 95%, making it feel quite muggy, in contrast to December's relatively lower humidity of 75%. For a more detailed look at July weather, check out Hiroshima weather in July.
The weather in December is markedly cooler than in August, with temperatures ranging from a minimum of -2°C (28°F) to a maximum of 20°C (68°F), averaging around 6°C (43°F). In contrast, August boasts much warmer temperatures, with a range from 17°C (63°F) to a scorching 36°C (97°F) and an average of 27°C (81°F). Precipitation also varies significantly; December experiences about 66 mm (2.6 in) spread over 10 days, while August sees a much higher amount of 257 mm (10.1 in) over 14 days, resulting in higher humidity levels of 93% compared to December's 75%. For more detailed information, you can check Hiroshima weather in August.
December and September weather in Hiroshima present a striking contrast. In December, temperatures range from a chilly minimum of -2°C (28°F) to a mild maximum of 20°C (68°F), with an average temperature of 6°C (43°F). Precipitation during this month totals 66 mm (2.6 in) over about 10 days, and humidity sits at 75%. Conversely, September boasts much warmer conditions, with temperatures spanning from a minimum of 12°C (54°F) to a sizzling maximum of 33°C (92°F) and an average of 23°C (73°F). Rainfall is significantly higher in September, reaching 230 mm (9.1 in) across 14 days, coupled with increased humidity at 84%. For more detailed information on September’s weather, check out Hiroshima weather in September.
In December, temperatures in Hiroshima range from a chilly -2°C (28°F) at night to a pleasant 20°C (68°F) during the day, with an average temperature of 6°C (43°F). The month sees around 66 mm (2.6 in) of precipitation over approximately 10 days, resulting in a humidity level of 75%. In contrast, October boasts milder temperatures, with minimums of 5°C (41°F) and pleasant highs of 28°C (84°F), averaging 17°C (63°F). October experiences significantly more rainfall, with 164 mm (6.5 in) across about 11 days and slightly higher humidity at 79%. For a closer look at the specifics of October weather, you can refer to Hiroshima weather in October.
December's weather presents a notable shift compared to November, featuring a slightly colder temperature range with minimums dipping to -2°C (28°F), while November has a minimum of -1°C (31°F). The average temperature in December is 6°C (43°F), which is lower than November's average of 11°C (52°F). Additionally, December experiences more precipitation, totaling 66 mm (2.6 in) over 10 days, compared to November's 39 mm (1.5 in) over just 5 days. Humidity levels are quite similar, with December at 75% and November slightly higher at 76%. For a closer look at November's weather specifics, you can refer to Hiroshima weather in November.
As December settles over Hiroshima, the city experiences a notable shift in weather compared to the milder months preceding it. The crisp air brings cooler temperatures, with the average dipping to a brisk 6°C, while the occasional warm day might reach up to 20°C. Precipitation is present, with about 66 mm falling over approximately 10 days, contributing to a humidity level that hovers around 75%. This combination of cooler temperatures and moisture sets the scene for a peaceful winter ambiance, making December a unique and reflective time to visit. For more detailed insights on the climate throughout the year, explore Hiroshima Climate.