Last updated: August 21, 2025
December in Aso, Japan offers a unique blend of cool temperatures and abundant humidity, creating a captivating winter atmosphere. With a maximum temperature reaching 21°C (70°F), the average stays around a crisp 5°C (41°F), dipping to a chilly -5°C (24°F) at night. Visitors can expect about 70 mm (2.8 in) of precipitation over seven days, contributing to the region's lush landscapes. The 79% humidity adds to the enchanting ambiance, making this month ideal for cozy experiences and picturesque winter scenes in Aso.
In Aso, Japan, December brings a noticeable chill as temperatures begin to dip further into winter. With minimums around -5°C (24°F), the cold is palpable, yet the average temperature hovers at a brisk 5°C (41°F), offering a sharp contrast to the milder conditions of the preceding months. Daytime highs can reach up to 21°C (70°F), showcasing Aso's unique climate with some surprisingly warm spells, particularly in the afternoons. This transition into winter sets the stage for the colder January ahead, while still allowing residents and visitors to enjoy the beauty of Aso’s landscape under a crisp, clear sky. The gradual decline in temperatures from November to December marks a distinct seasonal shift, highlighting the region's dynamic weather patterns.
In December, Aso, Japan, experiences a notable shift in precipitation patterns as the year draws to a close. With an average rainfall of 70 mm (2.8 in) over approximately 7 days, December serves as a precursor to the wetter months ahead. This amount, while relatively modest when compared to the summer peak in July, highlights a gradual increase from the preceding months, particularly from November's 60 mm (2.3 in). With the winter season approaching, the frequency of rain begins to taper off, but it still provides a refreshing change as the landscape transitions into the cooler months. The overall trend reflects a steady rainfall distribution across the year, punctuated by more intense downpours during the summer, while December quietly bridges the gap toward the winter's seasonal dryness.
In Aso, Japan, December marks a notable shift in humidity as it settles at 79%, a decline from the peak summer months. This drop is part of a broader trend where humidity levels begin to ease after the sweltering summer, which sees figures soaring above 90% in July and August. As the year draws to a close, the humidity gently recedes from the highs of 84% in September, allowing for a relatively more comfortable atmosphere. Interestingly, the winter months—particularly January and February—are characterized by steady humidity levels around the 70s, providing a crisp yet refreshing environment that contrasts sharply with the muggy summer. Overall, December serves as a transitional month, hinting at the drier conditions to come.
In Aso, Japan, the UV Index varies significantly throughout the year, reflecting the changing seasons. December sees a decline in UV exposure, with an index of 4, categorizing it as moderate and allowing for a safer outdoor experience with a burn time of 30 minutes. This follows a summer peak where the index reached extremes of 12 in both July and August, necessitating vigilant sun protection with a rapid burn time of just 10 minutes. As the year progresses from January's 4 to March's rising levels reaching 8, and then soaring to 11 in April, the trend unmistakably shows a shift toward high-risk sun exposure as spring gives way to summer. For those planning outdoor activities in December, it's a great time to enjoy the milder sun, while keeping in mind the overall trend of increasing UV levels during the year. To learn more about UV conditions throughout the year, visit Aso UV Index.
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As December settles over Aso, Japan, the region basks in a respectable 218 hours of sunshine, marking a gentle decline from the dazzling heights of summer. This month’s sunshine still captures the essence of early winter, echoing the vibrant 294 hours of August that draw sun-seekers to the area. Following a gradual decrease, the brightness of December continues the trend seen through the autumn months, dipping from the 232 hours of November. Yet, even as the days shorten, Aso’s skies often reveal a captivating interplay of light and shadow, offering a serene respite as nature prepares for the chill of January.
In December, Aso, Japan, experiences a 54% chance of sunny weather, marking a notable shift as the year draws to a close. This likelihood is higher than several preceding months, including the often grey days of summer, which see a steep drop in sunshine, particularly in June and July. Interestingly, as autumn transitions into winter, the percentage of sunny days begins to recover, as evidenced by both October and November, which boast 58% and 50% respectively. Overall, December offers a refreshing balance, suggesting that while the winter chill sets in, the sun still makes a welcome appearance, inviting residents and visitors alike to enjoy the scenic beauty of Aso under clear skies.
As December rolls into Aso, Japan, daylight duration settles at 10 hours, mirroring the conditions of both January and February. This pattern reflects a gradual retreat of daylight following the vibrant spring and summer months, where daylight peaked at a striking 14 hours during June and July. From the 11 hours in March to a gentle decline through the autumn months, each season showcases nature's rhythmic ebb and flow. As winter deepens, shorter days bring a serene atmosphere, inviting locals and visitors alike to embrace the beauty of Aso's landscapes under the soft glow of winter light.
As December arrives in Aso, Japan, the winds remain a gentle companion, averaging 2.3 m/s (5 mph). This month mirrors January's breezy demeanor, suggesting a consistent winter calm that extends through the cold season. Interestingly, the average wind speeds fluctuate slightly, reaching their peak in February with 2.9 m/s (6 mph) before tapering down to a soft whisper in June and October, where they dip to 1.7 m/s (4 mph) and 1.8 m/s (4 mph), respectively. Overall, the wind's presence in Aso is relatively mild throughout the year, with December's refreshing gusts echoing the tranquility of the surrounding landscape, inviting both locals and visitors to embrace the serene beauty of this winter season.
Weather in Aso varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Aso, focusing on differences in temperature, rainfall, humidity, and UV levels.
December weather typically presents a milder temperature range compared to January, with average highs reaching 21°C (70°F), while January sees a cooler average maximum of 16°C (62°F). The minimum temperature in December is slightly warmer at -5°C (24°F), compared to January’s colder minimum of -7°C (20°F). Precipitation is more frequent in December, with 70 mm (2.8 in) over 7 days, while January experiences slightly less at 58 mm (2.3 in) across 6 days. Additionally, humidity levels are higher in December at 79%, compared to January’s 75%. For a detailed look at what to expect in January, you can check Aso weather in January.
In December, temperatures range from a minimum of -5°C (24°F) to a maximum of 21°C (70°F), with an average of 5°C (41°F). The month sees about 70 mm (2.8 in) of precipitation over approximately 7 days, accompanied by relatively high humidity at 79%. In contrast, February experiences slightly cooler conditions, with minimum temperatures dipping to -8°C (18°F) and a maximum of 19°C (67°F), while maintaining the same average of 5°C (41°F). Precipitation increases to 98 mm (3.9 in) over 10 days, but humidity drops to a milder 71%. For those interested in the specifics of February weather, more details can be found at Aso weather in February.
December and March offer distinct contrasts in weather patterns. In December, temperatures typically range from a chilly -5°C (24°F) at night to a mild 21°C (70°F) during the day, with an average of 5°C (41°F). The month sees about 70 mm (2.8 in) of precipitation over 7 days, accompanied by high humidity at 79%. In contrast, March experiences slightly warmer temperatures, with a minimum of -3°C (27°F) and a maximum of 23°C (73°F), averaging 9°C (49°F). However, March is wetter, receiving 137 mm (5.4 in) of precipitation across 12 days and relatively lower humidity at 71%. For more insights into March weather, you can explore Aso weather in March.
In comparing December and April weather, we see notable differences in temperature and precipitation. December experiences colder temperatures, with a minimum of -5°C (24°F) and an average of 5°C (41°F), while April warms up significantly, featuring a minimum of -1°C (31°F) and an average of 14°C (57°F). Additionally, April boasts higher maximum temperatures, reaching up to 27°C (81°F) compared to December's maximum of 21°C (70°F). However, April also sees more precipitation, with 135 mm (5.3 in) over about 10 days, compared to December's 70 mm (2.8 in) over 7 days. Despite the increase in rainfall, humidity levels remain similar, at 79% for December and 78% for April. For more details on April weather in Aso, you can visit Aso weather in April.
December and May present stark contrasts in weather. In December, temperatures can drop as low as -5°C (24°F) with an average of around 5°C (41°F), peaking at a mild 21°C (70°F). Precipitation is relatively moderate with 70 mm (2.8 in) over 7 days, and humidity levels hover around 79%. Conversely, May experiences a much warmer climate, where temperatures range from a minimum of 2°C (36°F) to an average of 18°C (65°F), and can reach a maximum of 30°C (85°F). Rainfall is significantly higher in May at 209 mm (8.2 in) across 13 days, and humidity rises to 84%. For more specific details about this month, you can check Aso weather in May.
December and June represent two contrasting seasons in terms of weather. December experiences significantly colder temperatures, with a minimum of -5°C (24°F) and an average around 5°C (41°F), peaking at 21°C (70°F). This month sees relatively low precipitation, with 70 mm (2.8 in) falling over 7 days and humidity at 79%. In comparison, June is much warmer, with minimum temperatures around 11°C (52°F) and an average of 21°C (71°F), reaching a maximum of 31°C (88°F). However, June is also characterized by higher rainfall, accumulating 276 mm (10.9 in) over 16 days, and a humidity level rising to 86%. For a closer look at Aso's June weather, visit Aso weather in June.
The weather in December and July presents a striking contrast. In December, temperatures range from a chilly -5°C (24°F) to a mild 21°C (70°F), with an average of 5°C (41°F), creating a brisk atmosphere complemented by 70 mm (2.8 in) of precipitation spread over seven days and a humidity level of 79%. In stark comparison, July boasts a much warmer temperature range, with minimums at 15°C (59°F), average highs of 25°C (77°F), and maximums reaching up to 34°C (94°F). Rainfall is significantly more abundant in July, totaling 452 mm (17.8 in) over 21 days, along with a higher humidity of 92%. This shift from December's cooler, drier months to July's hot, wet conditions showcases the dramatic seasonal variations. For more details on the July climate, visit Aso weather in July.
In December, temperatures in Aso range significantly from a chilly minimum of -5°C (24°F) to a mild maximum of 21°C (70°F), averaging around 5°C (41°F). The month is characterized by a relatively low precipitation of 70 mm (2.8 in) over about 7 days, accompanied by a moderate humidity of 79%. In contrast, August brings much warmer weather, with temperatures ranging from a minimum of 16°C (62°F) to a scorching maximum of 35°C (96°F) and an average of 26°C (79°F). This month experiences substantial rainfall of 253 mm (10.0 in) over 16 days, coupled with higher humidity levels at 91%. For more details on August weather in Aso, refer to Aso weather in August.
December and September weather contrast significantly in terms of temperature, precipitation, and overall feel. In December, temperatures range from a chilly minimum of -5°C (24°F) to a comfortable average of 5°C (41°F), with a maximum reaching 21°C (70°F). This month sees about 70 mm (2.8 in) of precipitation over roughly 7 days, coupled with a humidity level of 79%. In contrast, September experiences milder temperatures, with a minimum of 9°C (49°F) and an average that peaks at 23°C (73°F), while highs can soar up to 33°C (92°F). Additionally, September is much wetter, receiving 192 mm (7.6 in) of rain spread across 15 days, resulting in slightly higher humidity at 84%. For more detailed information on September weather in the region, you can check Aso weather in September.
In comparing the weather between December and October, notable differences emerge in both temperature and precipitation patterns. December is generally cooler, with an average temperature of 5°C (41°F) and a maximum of 21°C (70°F), while October boasts milder conditions with an average of 17°C (63°F) and peaks reaching 30°C (87°F). Additionally, October experiences higher precipitation at 122 mm (4.8 in) across about 9 days, compared to December's 70 mm (2.8 in) over 7 days. Humidity levels are also slightly higher in October at 83%, whereas December holds a humidity level of 79%. For more detailed information about the weather during October, you can refer to Aso weather in October.
In comparing the weather of December and November, December exhibits cooler temperatures with an average of 5°C (41°F), a slight decrease from November’s warmer average of 11°C (51°F). While December’s minimum temperature reaches -5°C (24°F) compared to November’s -4°C (25°F), the maximums show a more noticeable difference, with December peaking at 21°C (70°F) versus November's 24°C (76°F). Precipitation is also a factor, as December records 70 mm (2.8 in) over 7 days, slightly higher than November’s 60 mm (2.3 in) over 8 days. Additionally, humidity levels are quite similar, with December at 79% and November at 81%. For more specifics about November weather, you can check Aso weather in November.
As December descends upon Aso, the weather transforms into a brisk chill, offering a striking contrast to the milder months preceding it. With average temperatures dipping to a cool 5°C, this month ushers in the heart of winter, showcasing the beauty of the season with a notable humidity of 79% that adds a crisp freshness to the air. While precipitation is relatively light, occurring over just seven days, the landscape often gleams under the gentle touch of early winter rain. This unique blend of chilly conditions and occasional moisture makes December a captivating time to experience Aso's natural beauty. For more detailed insights into the region's climate, visit Aso Climate.