December Weather in Naha, Japan

Last updated: August 21, 2025

In December, Naha, Japan showcases a mild winter climate, with maximum temperatures reaching up to 25°C (78°F) and an average of 20°C (69°F), making it a pleasant escape from colder regions. The minimum temperature can dip to around 14°C (58°F), particularly at night. However, visitors should be prepared for considerable precipitation, as the city experiences about 188 mm (7.4 in) of rainfall over 16 days. Humidity levels sit at a comfortable 75%, adding a touch of tropical warmth to the atmospheric charm of this vibrant Okinawan city during the festive season.

December Temperature in Naha

In December, Naha, Japan begins to transition into the cooler winter months, offering a pleasant climate with temperatures ranging from a minimum of 14°C (58°F) to a comfortable maximum of 25°C (78°F). The average temperature settles around 20°C (69°F), making this month ideal for outdoor activities and exploring the city's vibrant culture without the sweltering heat experienced in the summer. As the last month of the year, December marks a shift from the milder autumn conditions of November, yet it remains warmer compared to many other locations during this time, allowing visitors to enjoy a unique blend of seasonal charm and pleasant weather.

December Weather in Naha: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Naha, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Naha, December typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec656568707580828382797468
Data source: Temperature data for Naha generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Naha

In December, Naha, Japan experiences a notable shift in precipitation patterns, receiving 188 mm (7.4 in) of rain over 16 days. This marks a dip from the preceding months, particularly from the heavy rainfall typical of June and September, which often exceed 300 mm. Despite this reduction, December’s rainfall remains substantial, contributing to a cozy, atmospheric setting as the year draws to a close. As winter settles in, the precipitation often brings a refreshing respite, ensuring Naha’s lush landscapes maintain their vibrant greenery. The steady number of rainy days this month hints at the region's humid subtropical climate, balancing the wetter summer months with milder winter weather, inviting both locals and visitors to embrace the unique beauty of this Okinawan city.

December Precipitation Trends in Naha

The chart displays monthly precipitation patterns in Naha, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Naha, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec9197107137208302192206253160104188
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Naha

As December rolls into Naha, Japan, a noticeable decline in humidity emerges, settling at 75%. This marks a shift from the sweltering peaks of summer, where humidity levels soared to a consistent 86% in July and June. The transition is gentle, reflecting a gradual drop from November’s 79%, suggesting a reprieve as cooler winter months approach. Overall, the pattern shows an escalation in humidity from January’s 71% to the late spring highs, before tapering off into December. With its fluctuating levels, Naha showcases a dynamic climate, balancing warmth and moisture throughout the year.

December Average Humidity in Naha

This chart illustrates the average monthly humidity levels in Naha, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Naha is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec71%71%76%82%84%86%86%82%82%81%79%75%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Naha

In December, Naha, Japan experiences a noticeable dip in the UV Index, dropping to 6, which falls into the high exposure category. This reduction contrasts sharply with the extreme levels seen in the summer months, where the index peaked at 13 from May to August. With a burn time of 25 minutes, December allows for safer outdoor enjoyment compared to the brevity of 10 minutes in peak months. This trend highlights the shift from intense sun exposure to milder conditions as the year comes to a close. For more details on UV exposure throughout the year, check Naha UV Index.

Maximum UV Index Levels in Naha for December

The chart shows the monthly maximum UV Index (UVI) for Naha in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Naha typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec7911121313131312996
Data source: Naha December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

December Sunshine in Naha

In December, Naha, Japan, basks in a serene 192 hours of sunlight, marking a gentle transition as the year comes to a close. While this month experiences a noticeable dip compared to the sun-drenched heights of July and August, which boast impressive totals of 317 hours and 319 hours respectively, it still offers a comforting glow. As winter sets in, December’s sunshine follows a trend of gradually decreasing daylight that begins in the summer's peak, reflecting a seasonal rhythm that characterizes the region. Overall, even as the sun retreats in the final month of the year, Naha maintains a bright charm, making it a delightful destination for winter wanderers seeking a touch of warmth.

Monthly Sunshine Duration in Naha: December Highlighted

The December sunshine duration represents the total number of hours Naha experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec154h203h268h269h305h264h317h319h295h274h228h192h
Data source: Naha December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Naha During December

In December, Naha, Japan, experiences a 35% chance of sunny weather, marking a notable transition as the year winds down. This figure reflects a slight increase from the 30% likelihood in May and is higher than the more overcast months of June, where only 9% of days are likely to be sunny. As winter approaches, Naha sees a downward trend in sunny days, yet it remains a significant improvement from the depths of summer heat, particularly July's 30%. Overall, while December may not boast vibrant sunshine, it still offers a respectable opportunity for clear skies before the rainier months ahead.

Percentage of Sunny Days in December in Naha

The chart illustrates the percentage of sunny days in Naha throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Naha experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec24%42%46%39%30%9%30%39%59%51%44%35%
Data source: Naha December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Naha in December

As December rolls into Naha, Japan, the daylight duration settles at 10 hours, mirroring the shorter days of January and November. This seasonal rhythm highlights a gradual decrease in sunlight that begins in September, when daylight dips from the summer peak of 13 hours in June through August. Interestingly, March through May showcases a delightful transition toward longer days, reaching 13 hours in May before the trend reverses. Overall, Naha experiences a vibrant yet predictable cycle of daylight as the year progresses, with December marking the onset of winter's shorter days while offering a glimpse of the brighter months to come.

Average Daylight Hours in Naha for December

The chart illustrates the variation in daylight duration in Naha throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 41m11h 15m12h12h 46m13h 25m13h 44m13h 34m13h 1m12h 16m11h 30m10h 51m10h 30m
Data source: Naha daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Naha

As December rolls into Naha, Japan, the winds begin to soften slightly, with an average speed of 7.7 m/s (17 mph), showing a gentle decline from the robust November winds that also clocked in at 7.9 m/s. This month’s breezy conditions are reminiscent of the transitions seen throughout the year; while January starts strong at 8.2 m/s, it later dips to its lowest in September at 5.4 m/s. The wind patterns in Naha reflect a rhythm that ebbs and flows, with summer months like July and August holding onto a more spirited pace, while the early and late months of the year offer a more muted breeze. Overall, December embraces a comfortable wind, inviting those to enjoy Naha's scenic coastal beauty against a backdrop of mild winter air.

Average December Wind Speed in Naha

The chart displays monthly wind speed patterns in Naha, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec8.26.95.97.66.36.57.56.95.47.97.97.7 m/s
Data source: Naha December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Naha Compares to Other Months

Weather in Naha varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Naha, focusing on differences in temperature, rainfall, humidity, and UV levels.

In December, the weather is slightly warmer with average temperatures ranging from a minimum of 14°C (58°F) to a maximum of 25°C (78°F), accompanied by high humidity levels of 75% and significant rainfall totaling 188 mm (7.4 in) over 16 days. In contrast, January sees a drop in temperatures, with an average ranging from 12°C (54°F) to a maximum of 24°C (75°F), and a decrease in precipitation to 91 mm (3.6 in) over just 11 days, along with a slight reduction in humidity to 71%. For more detailed insights into the weather conditions, you can check Naha weather in January.

In December, the weather features a mild temperature range with minimums around 14°C (58°F) and maximums peaking at 25°C (78°F), accompanied by high humidity levels of 75%. This month experiences considerable rainfall, with an average precipitation of 188 mm (7.4 in) spread over 16 days, making it relatively wet.

In contrast, February offers a slightly cooler environment, with temperatures ranging from a minimum of 12°C (54°F) to a maximum of 24°C (76°F). The month is notably drier, receiving only 97 mm (3.8 in) of precipitation across 12 days and featuring lower humidity at 71%. For more specific details on the weather in February, you can check Naha weather in February.

Overall, while both months are mild, February tends to be drier and slightly cooler than December.

In December, the weather features temperatures ranging from a minimum of 14°C (58°F) to a maximum of 25°C (78°F), with an average of 20°C (69°F). This month tends to be quite wet, with 188 mm (7.4 in) of precipitation over 16 days, contributing to a humidity level of 75%.

In contrast, March exhibits similar temperature patterns, with a low of 14°C (57°F) and a high of 24°C (76°F), averaging around 20°C (68°F). However, it experiences significantly lower precipitation at 107 mm (4.2 in) over just 11 days, coupled with a slightly higher humidity of 76%.

For a detailed look at how conditions unfold during this time, check out Naha weather in March.

In December, the weather is pleasantly warm with average temperatures ranging from a minimum of 14°C (58°F) to a maximum of 25°C (78°F). However, this month also brings considerable rainfall, with about 188 mm (7.4 in) spread over 16 days, resulting in a humidity level of 75%. In contrast, April offers slightly warmer temperatures, with averages varying between 15°C (60°F) and 26°C (79°F), while experiencing less precipitation at 137 mm (5.4 in) across 11 days. The humidity is a bit higher in April at 82%, which contributes to a more tropical feel. For more specific details about the weather in Naha during April, you can check Naha weather in April.

December and May present distinct weather characteristics, with December being cooler and wetter compared to May. In December, temperatures range from a minimum of 14°C (58°F) to a maximum of 25°C (78°F), with an average temperature of 20°C (69°F). The month sees considerable rainfall, accumulating to 188 mm (7.4 in) over 16 days, accompanied by a humidity level of 75%.

In contrast, May enjoys warmer conditions, with temperatures starting at a minimum of 19°C (67°F) and peaking at 27°C (82°F), averaging 24°C (76°F). Rainfall slightly increases to 208 mm (8.2 in) but is spread over fewer days, only 12 in total, resulting in a higher humidity of 84%. This means that while both months are relatively rainy, May offers warmer temperatures and fewer rainy days, making it a preferable choice for outdoor activities. For more detailed information, check out Naha weather in May.

In December, the weather typically features milder temperatures, with a minimum of 14°C (58°F) and an average of 20°C (69°F), peaking at a maximum of 25°C (78°F). However, this month also brings significant precipitation, with 188 mm (7.4 in) falling over 16 days and a humidity level of 75%. In contrast, June is warmer, with minimum temperatures of 21°C (70°F), averaging around 26°C (80°F), and reaching up to 29°C (84°F). While June sees more rainfall, totaling 302 mm (11.9 in) over 19 days, the humidity rises to 86%, making it feel quite muggy. For a detailed overview of the weather specifics, check Naha weather in June.

December weather features milder temperatures, ranging from a minimum of 14°C (58°F) to a maximum of 25°C (78°F), with an average of 20°C (69°F). While it experiences significant precipitation of 188 mm (7.4 in) over 16 days, the humidity sits at a moderate 75%. In contrast, July is noticeably warmer, with temperatures starting at a minimum of 26°C (78°F) and reaching a maximum of 30°C (87°F), averaging 28°C (83°F). Although July has similar rainfall, with 192 mm (7.6 in) over just 13 days, the humidity is higher at 86%. For more details on July weather, check the link: Naha weather in July.

December weather presents a more moderate climate compared to the heat of August. With temperatures ranging from a minimum of 14°C (58°F) to a maximum of 25°C (78°F), December enjoys a pleasant average of 20°C (69°F). However, it also sees considerable rainfall, totaling 188 mm (7.4 in) over about 16 days, and a relatively high humidity level of 75%. On the other hand, August is significantly warmer, with temperatures that range from a minimum of 26°C (78°F) to a maximum of 30°C (87°F) and an average temperature of 28°C (83°F). It experiences slightly more precipitation at 205 mm (8.1 in) over 17 days, coupled with higher humidity at 82%. For more details about weather conditions during this month, you can visit Naha weather in August.

In comparing the weather between December and September, noticeable differences emerge in temperature and precipitation patterns. December features cooler temperatures, with a minimum of 14°C (58°F) and an average of 20°C (69°F), while September is significantly warmer, with a minimum of 24°C (75°F) and an average of 28°C (82°F). However, September also sees more rainfall, with 253 mm (10.0 in) of precipitation over 19 days, compared to December's 188 mm (7.4 in) spread across 16 days. Additionally, September has a higher humidity level at 82%, compared to December's 75%. For more specific details about the weather in September, you can check Naha weather in September.

In comparing the weather between December and October, December features cooler temperatures with a minimum of 14°C (58°F) and an average of 20°C (69°F), while October is warmer, displaying a minimum of 21°C (71°F) and an average of 26°C (79°F). October also experiences slightly less rainfall, accumulating 160 mm (6.3 in) over 13 days compared to December's 188 mm (7.4 in) over 16 days. Additionally, humidity remains high in both months, with October at 80% and December slightly lower at 75%. For more details, check out Naha weather in October.

In comparing the weather between November and December, December tends to be slightly cooler, with average temperatures ranging from a minimum of 14°C (58°F) to a maximum of 25°C (78°F). In contrast, November features warmer temperatures, with averages between 19°C (67°F) and 27°C (80°F). Additionally, December experiences significantly higher precipitation, totaling 188 mm (7.4 in) over 16 days, compared to 103 mm (4.1 in) over 11 days in November. The humidity levels are also slightly lower in December at 75%, compared to November's 79%. For further details, you can check Naha weather in November.

Compare Naha's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Naha

As December arrives in Naha, the weather transitions into a cooler, yet still pleasant phase. With an average temperature of 20°C (69°F), it marks a noticeable shift from the warmer months, offering a refreshing break while still retaining a mild charm. Humidity levels around 75% can make it feel a bit damp, complemented by approximately 188 mm of rainfall spread across 16 days. This month stands out for its unique blend of refreshing temperatures and intermittent showers, making it ideal for those looking to enjoy a quieter side of Naha. For a comprehensive look at how December fits into Naha's yearly climate patterns, check out Naha Climate.