Last updated: August 21, 2025
In Rusutsu, Japan, December weather presents a captivating winter landscape characterized by cold temperatures and frequent precipitation. With a maximum of 11°C (51°F) and an average of -4°C (25°F), visitors can expect a chilly atmosphere, dipping to a minimum of -17°C (2°F) during the month. The area experiences approximately 86 mm (3.4 in) of precipitation over 24 days, contributing to the season's enchanting snowy ambiance. Coupled with an average humidity level of 80%, this vibrant winter environment beckons those seeking to embrace the beauty of Japan's snowy terrain.
In December, Rusutsu, Japan experiences a distinct chill as temperatures dip noticeably, with minimums reaching -17°C (2°F) and average temperatures around -4°C (25°F). This trend of colder conditions sets the stage for the enchanting winter landscape that attracts snow enthusiasts from around the globe. As the month progresses, the maximum temperature rises to a moderate 11°C (51°F), offering fleeting moments of warmth amidst the frosty backdrop. The transition into winter is marked by significant drops, especially compared to November, signaling the onset of winter sports and the magical allure of snow-covered mountains. With each day, Rusutsu transforms into a winter wonderland, making December a captivating time to visit.
December in Rusutsu, Japan, greets winter with a substantial precipitation total of 86 mm (3.4 in), marking a shift to harsher conditions as the year draws to a close. Interestingly, this month sees 24 days of precipitation, the highest of the year, which suggests a persistent blanket of clouds and snowfall—ideal for winter sports enthusiasts. As precipitation begins to taper off from the heavier rainfall experienced in the summer months, December's slightly lower total signifies a transition to that quintessential winter atmosphere, where the abundance of moisture is transformed into picturesque snowy landscapes. This trend sets the stage for the skiing season, delighting both residents and tourists alike.
In December, Rusutsu, Japan, experiences a gentle dip in humidity, settling at 80% as the year closes. This month reflects a noticeable trend towards slightly lower levels compared to the summer peak of 95% in August, which provides a refreshing contrast to the intense dampness of peak season. As temperatures drop with the arrival of winter, the humidity stabilizes, hovering around 80%—a comfortable balance just below the higher winter months of January and February. This consistency in December offers a mild reprieve, setting the stage for the enchanting snowy landscapes that define Rusutsu's winter charm.
In Rusutsu, Japan, the UV Index shows a notable seasonal trend, reflecting the changing intensity of sunlight throughout the year. Starting with a low UV Index of 2 in December, residents and visitors enjoy safer exposure levels, with a burn time of 45 minutes. This marks a stark difference from the very high indexes experienced during the summer months, peaking at 10 from June to August, where the burn time dramatically decreases to just 15 minutes. As winter settles in, the UV Index drops back down, offering relief from the risk of sunburn that characterizes the warmer months. Understanding these variations is crucial for outdoor enthusiasts. To get detailed insights and forecasts, check out the Rusutsu UV Index.
UV Risk Categories
December brings a gentle lull in sunlight to Rusutsu, Japan, with 167 hours illuminating the landscape, a soft contrast to the fiercely bright summer months. As the year unfolds, sunlight peaks dramatically in the warmer season, reaching a high of 313 hours in July, while winter offers a cozy retreat, with January seeing only 135 hours of sun. The trend is clear: as seasons shift, so too does the light—July and August bask in the glory of abundant sunshine, while December signals the approach of winter, gently tapering off from the lofty heights of mid-year. This rhythmic dance of daylight not only paints the sky but also defines the unique seasonal tapestry of this charming Japanese locale.
December in Rusutsu, Japan, offers a 30% chance of sunny weather, placing it just below the mid-range for the year. As the cold settles in, the likelihood of sunshine dips slightly from November’s steady 35%, highlighting a gradual trend toward cloudier conditions as winter progresses. Interestingly, this month follows a predictable pattern, with the chances of sunlight often peaking in April at 41% before declining through the summer and autumn months. While December may not boast the sunniest disposition, it nonetheless provides a crisp and enchanting backdrop for winter sports enthusiasts.
In Rusutsu, Japan, December brings a return to shorter days, with daylight lasting for just 9 hours—a duration consistent with both November and January. This month marks the end of a gradual increase in sunlight that began in March, reaching its peak in June with 15 hours of daylight. As the year winds down, the transition from the vibrant sunlight of summer to the crisp, cozy ambiance of winter is evident. With daylight decreasing steadily from 14 hours in July to December's 9 hours, residents and visitors alike experience the serene beauty of shorter, quieter days, perfect for enjoying the snow-covered landscapes and winter activities in this enchanting region.
As winter blankets Rusutsu, Japan, the December wind whips through the area at an average speed of 2.7 m/s (6 mph), mirroring the calm breeze of November. This steady wind pattern is typical for the season, maintaining a gentle consistency seen throughout the year, with speeds hovering around 2.1 to 3.0 m/s across the months. While the winds are not fierce, they provide a refreshing chill that accompanies the snowy landscape, creating perfect conditions for winter sports enthusiasts. Thus, December, with its slightly brisk air, signals not just the heart of winter but also the onset of thrilling adventures amidst the snow-capped mountains.
Weather in Rusutsu varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Rusutsu, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January weather exhibit notable differences, particularly in temperature and precipitation patterns. In December, temperatures range from a minimum of -17°C (2°F) to a maximum of 11°C (51°F), with an average of -4°C (25°F). The month experiences higher precipitation levels at 86 mm (3.4 in) over 24 days, accompanied by relative humidity of 80%. In contrast, January is colder, with temperatures dipping to a minimum of -20°C (-4°F) and a maximum of only 4°C (39°F), averaging -6°C (22°F). This month sees reduced rainfall, totaling 64 mm (2.5 in) over 15 days, while humidity slightly increases to 84%. For more details on January weather conditions, you can refer to Rusutsu weather in January.
In December, temperatures range from a chilling minimum of -17°C (2°F) to a more moderate maximum of 11°C (51°F), with an average of -4°C (25°F). The month experiences significant precipitation, totaling 86 mm (3.4 in) over 24 days, accompanied by an 80% humidity level. In contrast, February sees slightly cooler conditions with temperatures dipping from -17°C (1°F) to a maximum of 7°C (45°F) and an average of -5°C (23°F). Precipitation decreases to 69 mm (2.7 in) across 18 days, while humidity rises slightly to 83%. For a more detailed look at February conditions, you can visit Rusutsu weather in February.
In December, the weather is notably colder with minimum temperatures reaching -17°C (2°F) and an average of -4°C (25°F), while March sees slightly milder conditions with a minimum of -13°C (10°F) and an average of 0°C (32°F). Both months experience significant precipitation, with December receiving 86 mm (3.4 in) over 24 days and March having a slightly higher total of 89 mm (3.5 in) but over just 14 days. Humidity levels remain similar, hovering around 80% in December and 81% in March. The gradual warming from December to March often brings a mix of winter and early spring weather conditions, making March an intriguing time for visitors. For more details on March weather specifically, you can check out Rusutsu weather in March.
In December, the weather is notably colder, with temperatures ranging from a frigid minimum of -17°C (2°F) to a maximum of 11°C (51°F), while the average temperature sits at -4°C (25°F). The month is marked by significant precipitation, totaling 86 mm (3.4 in), spread over 24 days, and humidity levels are consistently high at 80%.
In contrast, April experiences a milder climate, with temperatures rising from a minimum of -6°C (22°F) to a pleasant maximum of 19°C (67°F), and an average temperature of 5°C (41°F). Although April has slightly higher precipitation at 93 mm (3.7 in), it falls over just 12 days, making it feel less damp. The humidity remains similar at 81%.
For those interested in detailed insights, you can check Rusutsu weather in April.
December and May offer contrasting weather experiences. In December, temperatures are much colder, with a minimum of -17°C (2°F) and an average of -4°C (25°F), reaching a maximum of 11°C (51°F). This month is characterized by high humidity at 80%, with precipitation spread over 24 days, accumulating to 86 mm (3.4 in). In contrast, May brings a significant warming trend, with a minimum temperature of 2°C (35°F) and an average of 11°C (53°F), peaking at 29°C (84°F). Although the total precipitation remains similar at 87 mm (3.4 in), it falls over just 12 days, and the humidity slightly increases to 86%. For more details on weather in May, you can visit Rusutsu weather in May.
In December, the weather is characterized by cold temperatures, ranging from a minimum of -17°C (2°F) to a maximum of 11°C (51°F), with an average of -4°C (25°F). The month experiences significant precipitation, with 86 mm (3.4 in) falling over 24 days, and humidity levels averaging around 80%. In contrast, June brings a much milder climate, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 26°C (79°F), and an average temperature of 15°C (59°F). Although June sees higher total precipitation at 112 mm (4.4 in), it is more concentrated over just 11 days, and humidity levels increase slightly to 87%. For more information about the weather in June, visit Rusutsu weather in June.
December and July present stark contrasts in weather conditions. In December, temperatures can plunge as low as -17°C (2°F), with an average of -4°C (25°F) and a maximum of 11°C (51°F). This month experiences significant precipitation over 24 days, totaling 86 mm (3.4 in), contributing to a chilly and humid environment with around 80% humidity. Conversely, July offers a much warmer experience, with temperatures ranging from a minimum of 11°C (51°F) to a maximum of 31°C (89°F), averaging around 20°C (68°F). Although July sees slightly higher precipitation at 97 mm (3.8 in), it occurs over just 12 days, accompanied by higher humidity levels at 93%. This makes July a distinctly more humid and pleasant month compared to the cold, damp conditions of December. For more on the weather during this summer month, check out Rusutsu weather in July.
December and August present a stark contrast in weather conditions. December features frigid temperatures, with a minimum of -17°C (2°F) and maximum of 11°C (51°F), averaging around -4°C (25°F). The month sees a significant amount of precipitation, totaling 86 mm (3.4 in) over 24 days, combined with high humidity levels at 80%. In contrast, August offers much warmer conditions, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 32°C (89°F) and an average of 20°C (69°F). This month receives more rainfall, totaling 147 mm (5.8 in) across just 13 days, but is accompanied by higher humidity at 95%. For more specific details on August weather, you can refer to Rusutsu weather in August.
In December, temperatures plummet, with a minimum of -17°C (2°F) and an average of -4°C (25°F), making it a stark contrast to September, where temperatures range from a mild 4°C (39°F) at night to a warm 28°C (83°F) during the day. December experiences a total precipitation of 86 mm (3.4 in) over 24 days, while September sees a higher amount of 116 mm (4.6 in), albeit over just 14 days. The humidity is fairly high in both months, with December at 80% and September slightly higher at 88%. For a closer look at September's weather patterns, you can check Rusutsu weather in September.
December weather in Rusutsu is characterized by significantly colder temperatures, with a minimum of -17°C (2°F) and an average of -4°C (25°F), compared to October, which boasts a milder minimum of -2°C (29°F) and an average of 10°C (51°F). While both months experience considerable precipitation, October sees more rainfall at 115 mm (4.5 in) over 15 days, whereas December has 86 mm (3.4 in) across 24 days. Humidity levels are relatively similar, with December at 80% and October slightly higher at 83%. For more detailed information, check out Rusutsu weather in October.
In comparing the weather between November and December, December typically experiences colder temperatures, with a minimum of -17°C (2°F) and an average of -4°C (25°F), compared to November's milder minimum of -12°C (11°F) and an average of 3°C (39°F). November also tends to be slightly wetter, receiving 116 mm (4.6 in) of precipitation over 20 days, while December has a total precipitation of 86 mm (3.4 in) spread over 24 days. Humidity levels remain relatively similar, with December at 80% and November at 79%. For more detailed insights, you can refer to Rusutsu weather in November.
December in Rusutsu brings a distinct shift in weather as the region transitions into winter. With temperatures dipping significantly, you'll experience the crisp chill of the season, contrasting sharply with the milder autumn months. Precipitation is frequent, resulting in a unique blend of rain and snow, which makes the landscape breathtakingly beautiful yet often damp. The increased humidity contributes to a cozy atmosphere, perfect for enjoying indoor activities after a day in the snow. For those seeking to understand the nuances of what December offers compared to the rest of the year, explore more at Rusutsu Climate.