Last updated: August 21, 2025
In Yonakuni, Japan, December brings a refreshing climate characterized by a maximum temperature reaching 26°C (78°F) and an average of 21°C (71°F). The month experiences cooler nights with a minimum temperature of 13°C (56°F). However, it also sees significant precipitation, with 237 mm (9.3 in) falling over 24 rainy days, contributing to a consistently high humidity level of 78%. This combination of warmth and moisture creates a vibrant atmosphere, perfect for exploring the region's unique beauty during the festive season.
As December arrives in Yonakuni, Japan, the temperatures begin to dip slightly, marking a transition into the cooler winter months. The minimum temperature settles at 13°C (56°F), while the average reaches a comfortable 21°C (71°F), offering a pleasant reprieve from the summer heat. Daytime highs can peak at around 26°C (78°F), making the ambiance still relatively warm compared to many other regions. This gradual cool-down reflects a distinct shift from the balmy autumn temperatures of November, yet it remains significantly milder than winter in more northern parts of Japan. With these moderate conditions, December in Yonakuni presents a unique opportunity for visitors to enjoy outdoor activities amid a gentle climate.
In December, Yonakuni experiences significant precipitation, with an impressive 237 mm (9.3 in) of rain, making it the wettest month of the year. This month also marks a peak in rainy days, with 24 days of rainfall, contributing to the overall trend of increased precipitation as the year draws to a close. Notably, December's rainfall is a considerable jump from the prior months, particularly as it follows November's 195 mm. This pattern underscores the region's transition into the winter season, where the combination of moisture-laden air and changing weather patterns creates a vibrant, albeit soggy, end to the year for Yonakuni.
In Yonakuni, Japan, humidity levels in December settle at a comfortable 78%, marking a slight decrease from the preceding months. This drop is part of a broader trend observed during the winter months, as humidity levels gently decline from their peak in late spring and summer, where they consistently hover around 84%. From October to December, the humidity maintains a relatively stable range, suggesting a gradual shift towards drier conditions as the year draws to a close. While the winter months bring a lightness in humidity, the overall pattern reflects Yonakuni’s tropical climate, characterized by rich moisture levels throughout the majority of the year.
In Yonakuni, Japan, the UV Index shows a notable trend throughout the year, peaking from March to August with extreme levels of 13, which require minimal exposure to avoid burns—just 10 minutes of sunlight. As winter approaches, however, the index begins to drop, with December recording a UV Index of 7, categorized as high and allowing for a safer 25 minutes of sun exposure. Interestingly, the early months of the year, January and February, still maintain very high levels of UV radiation at 8 and 10, respectively, keeping sun safety in mind throughout the winter. For those planning outdoor activities, it's essential to stay informed about the UV levels, as each change can significantly impact skin safety. Explore more about the UV Index in Yonakuni here.
UV Risk Categories
In YonaKuni, Japan, December welcomes a modest 166 hours of sunshine, marking a decline from the preceding month's brighter 207 hours. This decrease is a part of a natural trend as the year draws to a close. After basking in the longest days of summer, with July peaking at 339 hours, winter settles in, bringing shorter daylight hours. Notably, while December's sunshine is significantly lower than the vibrant spring months, like April with 259 hours, it still holds a comforting glow in the midst of colder weather. As the island transitions through the seasons, the evolving patterns of sunlight reflect the unique rhythm of life in this beautiful location.
In December, Yonakuni, Japan sees a modest 21% chance of sunny weather, marking a slight dip from the previous months. As the year closes, December's sunshine probability is notably higher than the early summer months, where June stands at just 12%, and aligns closely with November's 25%. Interestingly, the sunny likelihood picks up significantly as the year transitions into autumn, peaking in September at 63%. This descending trend in sunlight from the warmer, sunnier months towards the end of the year suggests that while December may bring limited sunshine, it still offers more brightness than the low points of summer, making it a uniquely tranquil time to visit this serene island.
As the year winds down in Yunakuni, Japan, December brings a return to a familiar rhythm, with 10 hours of daylight echoing the shorter days of both November and January. This slight reduction in sunlight serves as a reminder of the contrasting brightness experienced in mid-spring and summer, where daylight peaks at a robust 13 hours from May through July. Transitioning through the year, daylight gradually increases from 10 hours in January to a vibrant 13 hours by June, before tapering off again as autumn approaches. Ultimately, this cyclical pattern highlights the essence of seasonal change, providing a unique blend of light and shadow that defines life in this picturesque locale.
As the year draws to a close, December in Yonakuni, Japan showcases a notable uptick in wind speed, averaging an invigorating 8.4 m/s (19 mph). This marks a shift from the milder breezes experienced during the summer months, particularly June's calm 4.1 m/s. Throughout the autumn, the winds began to pick up, with average speeds of 7.3 m/s in October and 7.5 m/s in November. The trend illustrates a return to brisker conditions, transforming the air into a refreshing backdrop for the island's picturesque scenery. As winter approaches, the December winds carry a promise of change, invigorating the landscape and inviting both residents and visitors to embrace the vibrant energy of the season.
Weather in Yonakuni varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Yonakuni, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather is typically warmer with temperatures ranging from a minimum of 13°C (56°F) to a maximum of 26°C (78°F) and an average of 21°C (71°F). This month also experiences significant precipitation, with 237 mm (9.3 in) falling over 24 days and an average humidity of 78%. In contrast, January sees slightly cooler temperatures, with a minimum of 12°C (53°F), an average of 20°C (68°F), and a maximum of 25°C (77°F). Precipitation drops to 133 mm (5.2 in) over 18 days, and humidity decreases slightly to 76%. For a more detailed look at January weather, visit Yonakuni weather in January.
In comparing the weather between December and February, we see a slight decrease in average temperatures: December ranges from a minimum of 13°C (56°F) to a maximum of 26°C (78°F), while February's temperatures are similar, with a minimum of 13°C (55°F) and a maximum of 25°C (77°F). Precipitation levels also drop significantly from 237 mm (9.3 in) over 24 days in December to 141 mm (5.5 in) across 18 days in February, making February noticeably drier. Additionally, humidity sees a marginal reduction from 78% in December to 74% in February, contributing to a more comfortable climate. For more insights on the weather in February, you can visit Yonakuni weather in February.
In December, temperatures in Yonakuni range from a minimum of 13°C (56°F) to a maximum of 26°C (78°F), with an average of 21°C (71°F). This month experiences significant rainfall, totaling 237 mm (9.3 in) across 24 days, contributing to a humidity level of 78%. In contrast, March sees slightly warmer temperatures with minimums around 16°C (61°F) and an average of 22°C (71°F), while still reaching a maximum of 26°C (80°F). Precipitation decreases to 195 mm (7.7 in) over 19 days, and humidity remains similar at 79%. Overall, while both months are warm, March tends to be milder and less rainy. For detailed weather insights, check out Yonakuni weather in March.
When comparing the weather in December and April, December tends to be cooler with average temperatures ranging from a minimum of 13°C (56°F) to a maximum of 26°C (78°F), while April experiences warmer conditions, with temperatures varying between 17°C (63°F) and 28°C (83°F). December also records significantly more precipitation, totaling 237 mm (9.3 in) over approximately 24 days, compared to April’s 179 mm (7.0 in) across 16 days. Additionally, humidity levels are slightly higher in April at 82%, compared to 78% in December. For a more detailed look at April weather, you can visit Yonakuni weather in April.
December and May present distinct weather patterns, each with its unique characteristics. In December, temperatures range from a minimum of 13°C (56°F) to a maximum of 26°C (78°F), with an average of 21°C (71°F). The month is marked by significant rainfall, accumulating to 237 mm (9.3 in) over 24 days, contributing to a humidity level of 78%. In contrast, May offers warmer temperatures, with a minimum of 21°C (70°F), an average of 26°C (79°F), and a peak of 29°C (85°F). Rainfall decreases to 180 mm (7.1 in) across 16 days, and the humidity rises slightly to 84%. For a detailed overview of May weather, you can check Yonakuni weather in May.
December and June present contrasting weather patterns. In December, temperatures range from a cool 13°C (56°F) at night to a warm average of 21°C (71°F) during the day, peaking at 26°C (78°F). The month is also marked by significant rainfall, with precipitation totaling 237 mm (9.3 in) over 24 days and humidity levels at 78%. In stark contrast, June experiences much warmer conditions, with nights averaging 25°C (77°F) and daytime temperatures reaching an average of 28°C (83°F), maxing out at 31°C (87°F). Although June sees slightly less rainfall at 215 mm (8.5 in) spread over 19 days, the humidity rises to 84%. For more detailed information, you can check out Yonakuni weather in June.
December and July present contrasting weather patterns. In December, temperatures range from a minimum of 13°C (56°F) to a maximum of 26°C (78°F), with an average of 21°C (71°F). This month experiences significant rainfall, totaling 237 mm (9.3 in) over 24 days, and the humidity stands at 78%. In contrast, July is much warmer, with temperatures ranging from a minimum of 26°C (79°F) to a maximum of 30°C (87°F), averaging 29°C (84°F). Although July sees less precipitation at 193 mm (7.6 in) over 16 days, humidity is slightly higher at 84%. For more details on July weather, visit Yonakuni weather in July.
In December, the weather is markedly cooler, with temperatures ranging from a minimum of 13°C (56°F) to a maximum of 26°C (78°F) and an average of 21°C (71°F). This month also experiences significant rainfall, with 237 mm (9.3 in) of precipitation spread over 24 days, resulting in a humidity level of 78%. In contrast, August is much warmer, with temperatures ranging between 26°C (79°F) and 31°C (87°F), averaging at 29°C (84°F). While August also has substantial rainfall at 221 mm (8.7 in) over 19 days, the humidity is slightly higher at 83%. For more detailed weather information, check Yonakuni weather in August.
In December, the weather is noticeably cooler, with minimum temperatures dropping to 13°C (56°F) and an average high of 26°C (78°F), while September enjoys warmer temperatures, typically ranging from a minimum of 25°C (77°F) to a maximum of 30°C (87°F). While December sees more frequent precipitation, with 237 mm (9.3 in) spread over 24 days, September experiences less rainfall at 160 mm (6.3 in) across 16 days. Additionally, December has a lower humidity level at 78%, compared to September's higher humidity of 82%. For more insights on September weather, visit Yonakuni weather in September.
In comparing the weather between December and October, December presents a cooler climate with average temperatures ranging from a minimum of 13°C (56°F) to a maximum of 26°C (78°F). The month is characterized by increased precipitation, receiving about 237 mm (9.3 in) over 24 days, and holds a humidity level of 78%. In contrast, October enjoys warmer conditions, with average temperatures fluctuating between 21°C (71°F) and 29°C (85°F), along with slightly less rainfall at 188 mm (7.4 in) across 18 days, though humidity is a bit higher at 81%. For more details on October weather, you can explore Yonakuni weather in October.
December generally experiences slightly cooler temperatures compared to November, with average highs of 26°C (78°F) in December versus 27°C (81°F) in November. The minimum temperatures in December drop to 13°C (56°F), whereas November maintains a warmer minimum of 20°C (68°F). Precipitation in December is more significant with 237 mm (9.3 in) spread over 24 days, compared to November’s 195 mm (7.7 in) over 23 days. Humidity levels remain relatively high in both months, with December at 78% and November slightly higher at 80%. For more detailed insights into November weather, you can check Yonakuni weather in November.
As December unfolds in Yonakuni, the island experiences a noticeable shift in weather compared to other months. With average temperatures settling around a comfortable 21°C (71°F), this month marks a drop from the warmer autumn values. Rainfall also plays a significant role, as December brings increased precipitation, with nearly 24 days of showers adding up to 237 mm (9.3 in). Coupled with a humidity level hovering at 78%, the atmosphere can feel quite damp and cool. This unique blend of mild temperatures and frequent rain creates a distinctive charm in Yonakuni, making it different from the drier, warmer months before. For more insights into the climate of this beautiful island, check out Yonakuni Climate.