Last updated: August 21, 2025
In Hamamatsu, Japan, December brings a fascinating blend of weather elements, perfect for those who appreciate the charm of cooler climes. With maximum temperatures reaching 23°C (74°F) and an average of 9°C (49°F), the month sees a noticeable chill, especially at night when temperatures can dip to a brisk 0°C (32°F). Rainfall is moderate, with 67 mm (2.6 in) of precipitation spread over six days, creating a lush environment that enhances the city’s natural beauty. Coupled with a humidity level of 78%, this month embodies a unique atmosphere, inviting both locals and visitors to enjoy the seasonal sights and sounds of Hamamatsu.
As December blankets Hamamatsu, Japan, the temperatures begin to hint at winter's chill, with minimums dropping to 0°C (32°F). However, the contrast between the chilly nights and relatively moderate daytime temperatures creates a unique atmosphere, where the average sits around 9°C (49°F) and the maximum can reach up to 23°C (74°F). Compared to the more extreme temperatures of the preceding summer months, December ushers in a refreshing coolness, marking a transition into the winter season. This month effectively captures the essence of early winter in Hamamatsu, with crisp mornings and pleasant afternoons that beckon both locals and visitors to embrace the beauty of the season.
In December, Hamamatsu experiences a noticeable shift in precipitation patterns as the year draws to a close. With 67 mm (2.6 in) of rainfall spread over 6 days, this month marks a decrease from the previous month's 83 mm (3.3 in), signaling a transition towards the drier winter season. Notably, December's precipitation is significantly lower than the peak summer months, where the rain can swell to over 400 mm, showcasing the region's dynamic climate. As colder temperatures settle in, these December rains often bring a sense of calm after the vibrant precipitation peaks of summer and early fall, providing a gentle reminder of the seasonal ebb and flow of Hamamatsu's weather.
In December, Hamamatsu, Japan experiences a moderate humidity level of 78%, marking a slight decrease from the highs of summer but remaining elevated compared to the drier months of earlier in the year. This month showcases a gradual drop from the peak of 93% in July and the consistent highs of 88% in June and 90% in August, reflecting the city's transition into winter. As temperatures cool, the humidity stabilizes, maintaining a comfort level akin to the earlier months of the year, particularly when compared to the 76% recorded in January. December serves as a reminder of the region’s humid subtropical climate, where moisture lingers through the winter months, wrapping the city in a comfortable yet glistening atmosphere.
As the year draws to a close, December in Hamamatsu, Japan, sees a moderate UV Index of 4, allowing for a burn time of 30 minutes. This mirrors the earlier months of January and November, where the UV levels also remained fairly low. Notably, the peak summer months, from May to August, experience an extreme UV Index, reaching as high as 12 in July, resulting in significantly reduced safe sun exposure times. This clear seasonal trend highlights how the sun's intensity varies throughout the year, emphasizing the importance of protective measures during the hotter months. For those planning outdoor activities in December and beyond, you can stay informed about current UV levels with detailed information available at Hamamatsu UV Index.
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December in Hamamatsu, Japan, brings a gentle dip in sunshine, offering 230 hours of daylight. As the year winds down, it’s interesting to note that this month follows a pattern of decreasing sunlight after the summer peak of 317 hours in August. The transition from the vibrant summer months to the cooler winter days is clearly marked, as hours of sunshine gradually decline since May's high of 299 hours. Despite December's shorter days, it still holds a substantial amount of brightness compared to the early winter months, promising moments of warmth even as temperatures fall. This trend reflects the region's unique climate, where residents can still enjoy ample daylight during the festive and reflective season of the year.
In December, Hamamatsu, Japan, enjoys a notable 73% chance of sunny weather, making it one of the brightest months of the year. This impressive figure stands in sharp contrast to the sunnier months of January and February, which hover around 58% and 60% respectively, shedding light on a distinct upward trend as the year winds down. Interestingly, while spring and summer months experience a decline in sunshine, December’s weather is increasingly cheerful compared to the more overcast conditions of mid-year, exemplified by the lowest sun chances in June and July at just 25% and 34%. As autumn transitions to winter, residents and visitors alike can look forward to a holiday season bathed in sunshine, a welcome surprise after the cloudier months preceding it.
In Hamamatsu, Japan, the journey through the year is marked by a distinct ebb and flow in daylight hours. December stands out with just 9 hours of light, reflecting the gradual decline that begins in late autumn. As the seasons transition, daylight begins to increase from February onwards, peaking at 14 hours in the vibrant summer months of June and July. This seasonal rhythm offers a captivating glimpse into the shifting balance of light, with longer days inviting outdoor exploration in spring and summer, while the shorter days of winter prompt cozy indoor gatherings. As the year wraps up, the trend towards diminishing daylight culminates in the soft, reflective stillness of December, setting the stage for a new cycle to begin in January.
As December arrives in Hamamatsu, Japan, the average wind speed picks up to 4.4 m/s (10 mph), signaling a subtle increase as the year draws to a close. Reflecting a trend of seasonal variation, December's winds are notably stronger than the calmer summer months, which see averages dip to their lowest, around 2.6 m/s (6 mph) in July. Interestingly, December's breeze rivals that of earlier winter months, such as January at 4.6 m/s (10 mph), hinting at a crisp, invigorating atmosphere perfect for the festive season. This pattern underscores a shift towards brisk winds as the city transitions from the gentler spring and summer air, inviting residents and visitors alike to enjoy the refreshing chill that heralds the end of the year.
Weather in Hamamatsu varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Hamamatsu, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather experiences a milder range with average temperatures from a minimum of 0°C (32°F) to a maximum of 23°C (74°F), alongside a precipitation total of 67 mm (2.6 in) over about six days. The humidity level is relatively high at 78%. In contrast, January sees a slight drop in temperatures, with a minimum of -2°C (29°F) and a maximum of 18°C (64°F), leading to a cooler average of 7°C (44°F). The precipitation also decreases to 51 mm (2.0 in) over just four days, with humidity slightly lower at 76%. For a detailed overview of January weather, visit Hamamatsu weather in January.
December and February both experience relatively mild temperatures, but February tends to be cooler overall. In December, the temperature ranges from a minimum of 0°C (32°F) to a maximum of 23°C (74°F), with an average of 9°C (49°F). Conversely, February sees a minimum of -2°C (29°F) and a slightly lower average of 7°C (46°F), with highs reaching 21°C (71°F). Rainfall is slightly higher in February, totaling 76 mm (3.0 in) compared to December's 67 mm (2.6 in), but both months have precipitation occurring on approximately six days. Humidity levels are also similar, with December at 78% and February at 74%. For more detailed insights into February weather in Hamamatsu, you can visit Hamamatsu weather in February.
In December, the weather features minimum temperatures around 0°C (32°F) and averages around 9°C (49°F), with maximums reaching up to 23°C (74°F). This month experiences relatively low precipitation, totaling 67 mm (2.6 inches) over approximately 6 days, and humidity levels tend to be high at 78%. In contrast, March brings slightly milder temperatures, with minimums at 1°C (34°F) and an average of 12°C (53°F), peaking at 25°C (77°F). However, March is significantly wetter, with precipitation increasing to 166 mm (6.5 inches) over about 10 days, and humidity levels dropping to 70%. For more detailed information about the weather in March, you can visit Hamamatsu weather in March.
In December, temperatures in Hamamatsu typically range from a minimum of 0°C (32°F) to a maximum of 23°C (74°F), with an average temperature of 9°C (49°F). The month experiences around 67 mm (2.6 in) of precipitation over 6 days, accompanied by relatively high humidity levels at 78%. In contrast, April sees a notable increase in warmth, with minimum temperatures rising to 3°C (37°F) and maximums reaching 28°C (83°F), averaging 15°C (60°F). However, April is considerably wetter, receiving 172 mm (6.8 in) of rain over 11 days and a slight decrease in humidity to 74%. For more specific details, check out Hamamatsu weather in April.
In December, temperatures in Hamamatsu range from a chilly minimum of 0°C (32°F) to a pleasant maximum of 23°C (74°F), with an average temperature of 9°C (49°F). The weather is relatively dry with an average precipitation of 67 mm (2.6 in) over about 6 days, and the humidity hovers around 78%. In contrast, May brings warmer temperatures, with lows of 9°C (49°F) and highs reaching up to 32°C (90°F), resulting in an average of 20°C (68°F). However, it also sees increased rainfall, totaling 198 mm (7.8 in) over approximately 12 days, and a slight rise in humidity to 81%. For more detailed information on the weather in May, you can visit Hamamatsu weather in May.
When comparing the weather in December and June, distinct differences emerge. December features cooler temperatures with a minimum of 0°C (32°F) and an average of 9°C (49°F), while June experiences much warmer conditions, ranging from a minimum of 15°C (59°F) to an average of 23°C (74°F). Precipitation levels are also notably different; December sees just 67 mm (2.6 inches) over 6 days, whereas June has a much wetter climate with 261 mm (10.3 inches) spread across 16 days. Additionally, humidity levels are higher in June at 88%, compared to 78% in December. For more detailed insights into June weather in Hamamatsu, visit Hamamatsu weather in June.
December and July present strikingly different weather patterns. In December, temperatures range from a chilly 0°C (32°F) at night to a comfortable 23°C (74°F) during the day, with an average of around 9°C (49°F). Precipitation is moderate, totaling 67 mm (2.6 in) over about 6 days, accompanied by a humidity level of 78%. In contrast, July boasts significantly warmer temperatures, with nights only dipping to a minimum of 19°C (67°F) and daytime highs reaching up to 40°C (105°F), averaging around 27°C (81°F). The month is much wetter with 408 mm (16.1 in) of rain over 21 days and a humidity level of 93%, creating a noticeably steamy atmosphere. For a more detailed perspective on the weather conditions during this month, visit Hamamatsu weather in July.
The weather in December is notably cooler than in August, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 23°C (74°F), averaging around 9°C (49°F). In contrast, August boasts much warmer temperatures, with a minimum of 20°C (68°F) and soaring highs of 42°C (107°F), averaging 29°C (84°F). While December experiences less precipitation (67 mm over 6 days), August is considerably wetter, receiving 197 mm over 15 days, coupled with a higher humidity level of 90%. For more detailed insights into August's weather patterns, check out this link: Hamamatsu weather in August.
In comparing the weather of December and September, it's clear that these months exhibit significant contrasts. December tends to be much cooler, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 23°C (74°F) and an average of 9°C (49°F). The month is characterized by lower humidity at 78% and only 67 mm (2.6 in) of precipitation spread over about 6 days. In stark contrast, September brings much warmer conditions, with temperatures ranging from a minimum of 15°C (60°F) to a sizzling maximum of 36°C (96°F) and an average of 25°C (77°F). This month also experiences higher humidity at 86% and significantly more rainfall—222 mm (8.7 in)—over roughly 20 days. For more details on September weather, you can visit Hamamatsu weather in September.
In comparing the weather between December and October, October experiences significantly warmer temperatures, with a minimum of 10°C (50°F) and an average high of 32°C (89°F), while December's temperatures range from a chilly 0°C (32°F) up to a maximum of 23°C (74°F). Additionally, October sees a substantial amount of rainfall, totaling 293 mm (11.5 in) over 15 days, compared to December's much lighter precipitation of 67 mm (2.6 in) over just 6 days. Humidity levels are also a bit higher in October at 83%, compared to December's 78%. For a detailed look at October weather in Hamamatsu, visit Hamamatsu weather in October.
In comparing the weather of December and November, December tends to be cooler, with average temperatures ranging from a minimum of 0°C (32°F) to a maximum of 23°C (74°F), while November features a slightly warmer average, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 24°C (75°F). Additionally, December experiences lower precipitation at 67 mm (2.6 in) over 6 days, compared to November's 83 mm (3.3 in) across 8 days. Humidity levels remain relatively similar, with December at 78% and November slightly higher at 80%. For a more detailed look at November weather, you can check Hamamatsu weather in November.
As December sets in, Hamamatsu experiences a notable shift in weather, with temperatures dropping significantly compared to the milder months prior. Maxing out at 23°C during the day is quite rare, while the average cools to a brisk 9°C, and nights can edge down to a chilly 0°C. This month also sees an uptick in humidity, which hovers around 78%, contributing to a damp atmosphere despite only 6 days of precipitation. With a total of 67 mm of rainfall, December provides a contrast to Hamamatsu's typically drier months, creating a unique blend of cool temperatures and occasional wet weather. For a deeper dive into the city's climate patterns, visit Hamamatsu Climate.