Last updated: August 21, 2025
In Amami, Japan, December brings a mild climate characterized by a maximum temperature of 25°C (77°F) and an average of 18°C (65°F), making it a pleasant time to explore the area. The minimum temperature drops to 12°C (55°F), so visitors should be prepared for cooler evenings. December is also a relatively wet month, with 125 mm (4.9 in) of rain spread over 16 days, contributing to a humidity level of 74%. As the holiday season approaches, the combination of comfortable temperatures and lush, green landscapes makes Amami a captivating destination for those seeking both relaxation and adventure.
In December, Amami, Japan experiences mild temperatures that gently transition into the cooler winter months. With a minimum of 12°C (55°F) and an average of 18°C (65°F), the weather remains relatively comfortable compared to many other regions during this time. The maximum temperature can reach 25°C (77°F), offering a pleasant escape from the chill. This month marks a noticeable drop in temperature from November's warmer averages, yet it retains a soft warmth that characterizes Amami's winter climate. December's mildness makes it an inviting time for visitors, as the island showcases its natural beauty against a backdrop of mild, sunny days.
In December, Amami, Japan, experiences a notable shift as the year draws to a close. With 125 mm (4.9 in) of precipitation over 16 days, the month showcases a transition from the drier conditions of November, which recorded 121 mm (4.8 in) on fewer days. This uptick in rainfall is part of a broader trend observed throughout the winter months, where precipitation levels begin to moderate after the peak rainy season in June. Compared to the earlier months, December’s rainfall helps maintain the lush landscapes endemic to Amami, making it a vital period for local flora. The moist, cool air coupled with the distinctive beauty of the region makes December an intriguing time, where the vibrant greenery persists despite the ongoing downpours.
In December, Amami experiences a noticeable dip in humidity, averaging 74%, which reflects a broader trend of decreasing moisture levels as the year draws to a close. Following the peak summer months, particularly July and June, where humidity reaches its highest at 89% and 87%, the descending figures suggest a gradual transition into the cooler winter months. As the days shorten and temperatures drop slightly, December's humidity starts to stabilize after a series of moist months from April to August, highlighting the region’s seasonal shifts. This drop not only marks a respite from the intense humidity of summer but also sets the stage for the drier months ahead.
In December, Amami, Japan experiences a noticeable shift in its UV Index, dropping to 6, categorized as high. This reduction signals a welcome respite from the extreme levels that dominate the summer months, where the UV Index consistently reached 13. As the year closes, residents and visitors alike enjoy a safer sun exposure time of 25 minutes before risking a burn, compared to the rapid 10 minutes common from March through September. This seasonal trend reflects a gradual decline in UV radiation, making December an ideal time for outdoor activities while still reminding us to enjoy the sun responsibly. For more details, check out the Amami UV Index.
UV Risk Categories
December in Amami, Japan, marks the transition into a cooler season, and the sunshine hours reflect this change. With 175 hours of sunlight, December experiences a dip compared to the vibrant 323 hours in August, yet it maintains a pleasant glow, reminiscent of the depths of summer. This gradual decrease is part of a broader trend, where sunshine peaks in the summer months, peaking in July and August, before gradually dwindling through autumn and into winter. While December's hours may be lower, the gentle warmth of the sun still lingers, inviting residents and visitors alike to savor the beauty of a tranquil island winter, as they prepare for brighter days ahead.
In December, Amami, Japan, experiences a 31% chance of sunny weather, a slight uptick from the preceding month, November, which sees a 33% likelihood of sunshine. This trend reflects a broader seasonal fluctuation, where the likelihood of sun typically hovers around the 30% range during the winter months. Notably, the sun's chances seem to rise as the year progresses toward spring, with the highest probabilities found in early months like February and August at 37%. As December approaches, while sunny days may be less frequent than in the earlier months, the transition to brighter skies offers a hopeful glimpse of the warmer seasons ahead.
In Amami, Japan, December brings a return to the shorter days of winter, with just 10 hours of daylight. This marks a dip from the extended sunlight experienced in the months prior; daylight peaked in the vibrant month of May with 13 hours. Throughout the year, a clear trend emerges as daytime hours gradually increase from 10 hours in January to a summer plateau of 13 hours from June to August. As autumn descends, sunlight begins to wane again, dropping to 11 hours in October and reverting to 10 hours in both November and December. This cyclical pattern highlights the region's rhythmic transition between longer days in warmer months and shorter daylight hours during the cooler, winter season.
As December settles in Amami, Japan, the winds swirl with an average speed of 7.1 m/s (16 mph), mirroring the briskness felt throughout the year. Following a steady rise from the gentle breezes of September, which only reached 4.8 m/s (11 mph), wind speeds gradually increased during the autumn months. November's winds were notably strong at 7.4 m/s, setting the stage for December's consistent gales. While the winter months typically bring a chill, December's winds maintain a similar intensity as seen in the preceding months, hinting at a robust, dynamic atmosphere that characterizes this enchanting island at the end of the year.
Weather in Amami varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Amami, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather is generally warmer, with average temperatures ranging from a minimum of 12°C (55°F) to a maximum of 25°C (77°F) and an overall average of 18°C (65°F). The month experiences significant rainfall, with 125 mm (4.9 in) of precipitation over 16 days, contributing to a humidity level of 74%.
In contrast, January sees slightly cooler temperatures, with a minimum of 10°C (50°F), an average of 16°C (61°F), and a maximum of 22°C (72°F). Rainfall decreases to 98 mm (3.9 in) over just 12 days, resulting in a slightly lower humidity of 72%. For more detailed information, you can visit Amami weather in January.
December and February both experience mild temperatures, but there are notable differences in their weather patterns. In December, temperatures range from a minimum of 12°C (55°F) to a maximum of 25°C (77°F), with an average of 18°C (65°F). This month sees higher precipitation with 125 mm (4.9 in) spread over 16 days and a humidity level of 74%. In contrast, February is slightly cooler, with temperatures ranging from a minimum of 9°C (49°F) to a maximum of 23°C (73°F) and an average of 16°C (61°F). February also experiences less rainfall, totaling 114 mm (4.5 in) over 14 days, and a lower humidity of 70%. For more detailed insights, you can check Amami weather in February.
In comparing the weather of December and March, we find that both months have similar average temperatures, hovering around 18°C (65°F). However, December features slightly warmer maximum temperatures (25°C or 77°F) compared to March, which reaches up to 23°C (73°F). Precipitation trends show that March is wetter, with 159 mm (6.3 in) of rain over 15 days, compared to December's 125 mm (4.9 in) across 16 days. Additionally, humidity levels are quite close, with December at 74% and March at 76%. For those seeking more detailed information about March weather, you can check the following link: Amami weather in March.
In comparing the weather of December and April, we see some interesting similarities and differences. December has a minimum temperature of 12°C (55°F) and an average of 18°C (65°F), while April starts slightly warmer with a minimum of 13°C (56°F) and an average of 20°C (68°F). Notably, both months reach a maximum temperature of 25°C (77°F). Precipitation levels are comparable, with December experiencing 125 mm (4.9 in) over 16 days, and April slightly lower at 121 mm (4.8 in) over just 12 days. Humidity is notably higher in April at 82%, compared to December’s 74%. For more detailed information about April weather, check out Amami weather in April.
In December, the weather features milder temperatures with a minimum of 12°C (55°F) and an average of 18°C (65°F), peaking at a maximum of 25°C (77°F). The month sees a total precipitation of 125 mm (4.9 in) over 16 days, along with a humidity level of 74%. In contrast, May experiences warmer conditions, with temperatures ranging from a minimum of 18°C (65°F) to an average of 23°C (73°F) and a maximum of 27°C (80°F). However, May also brings higher rainfall, totaling 213 mm (8.4 in) over the same number of days, alongside increased humidity at 84%. To learn more about the specifics of the weather during this month, you can check out Amami weather in May.
In December, temperatures range from a mild 12°C (55°F) at night to a comfortable average of 18°C (65°F) during the day, with a maximum reaching up to 25°C (77°F). The month experiences about 125 mm (4.9 in) of rainfall over 16 days, accompanied by a humidity level of 74%. In contrast, June sees significantly warmer weather, with nighttime lows at 20°C (69°F) and daytime averages climbing to 25°C (78°F), peaking at 28°C (83°F). The precipitation in June is much higher, totaling 433 mm (17.0 in) across 20 days, and the humidity also increases to 87%. This stark difference highlights December's relatively dry and mild conditions compared to the wetter and more humid atmosphere of June. For more detailed insights on the weather, visit Amami weather in June.
In December, the weather features milder temperatures, with averages ranging from a minimum of 12°C (55°F) to a maximum of 25°C (77°F), making it a comfortable month for outdoor activities. However, it does see significant precipitation, averaging 125 mm (4.9 in) over 16 days, with humidity levels sitting at 74%. In contrast, July brings much warmer conditions, with temperatures ranging from a minimum of 24°C (76°F) to a maximum of 31°C (87°F), providing a typical summer vibe. Although July enjoys slightly fewer rainy days, it experiences higher total precipitation at 185 mm (7.3 in) and increased humidity at 89%, leading to a more tropical feel. For more detailed insights into July's weather, check out this link: Amami weather in July.
December and August present stark contrasts in weather patterns. In December, temperatures range from a mild minimum of 12°C (55°F) to a pleasant maximum of 25°C (77°F), with an average of 18°C (65°F). However, this month experiences significant precipitation, measuring 125 mm (4.9 in) over 16 days and a humidity level of 74%. In contrast, August is much warmer, with minimum temperatures starting at 25°C (77°F) and peaking at 31°C (87°F), averaging 28°C (83°F). It also sees higher rainfall, totaling 193 mm (7.6 in) over 14 days, accompanied by increased humidity at 84%. For more details on August weather in Amami, visit Amami weather in August.
When comparing the weather in December and September, notable differences emerge. December experiences milder temperatures, with a minimum of 12°C (55°F) and an average high of 25°C (77°F), while September is significantly warmer, with a minimum of 24°C (75°F) and an average high of 30°C (87°F). Additionally, December sees less rainfall, with precipitation totaling 125 mm (4.9 in) over 16 days, compared to September's heavier rainfall of 223 mm (8.8 in) across 20 days. Humidity levels also differ slightly, with December at 74% and September at 81%, indicating a more comfortable atmosphere in December. For a more detailed look at September's weather patterns, you can check out Amami weather in September.
In comparing the weather of December and October, we find notable differences. December experiences a cooler temperature range, with a minimum of 12°C (55°F) and an average of 18°C (65°F), while October remains warmer, with a minimum of 20°C (68°F) and an average of 25°C (77°F). Precipitation levels are relatively high in both months, but December has slightly less rain, totaling 125 mm (4.9 in) over 16 days compared to October's 151 mm (5.9 in) over 14 days. Additionally, the humidity in December averages around 74%, which is a little lower than October's 79%. For more detailed information, you can check Amami weather in October.
In comparing the weather of November and December, we observe notable differences in temperature and humidity. December experiences a slightly lower temperature range with a minimum of 12°C (55°F) and a maximum of 25°C (77°F), while November maintains warmer temperatures, ranging from a minimum of 16°C (62°F) to a maximum of 26°C (78°F). Precipitation levels are quite similar, with December receiving 125 mm (4.9 in) over 16 days and November slightly less at 121 mm (4.8 in) across 12 days. Humidity is marginally lower in December at 74% compared to November's 77%, contributing to a more comfortable atmosphere. For a detailed overview of November weather, you can check out Amami weather in November.
As December blankets Amami in cooler temperatures, it marks a distinct shift from the warmer months. With average highs of 25°C giving way to mild lows around 12°C, the air carries a fresh, crisp quality, making it an inviting time for outdoor exploration. However, this month is also characterized by increased precipitation, averaging 125 mm over 16 rainy days, resulting in higher humidity levels at 74%. This unique blend of coolness and moisture creates a lush environment, setting December apart as a refreshing yet somewhat damp transition into winter months. For more details about the year-round climate, visit Amami Climate.