December Weather in Osaka, Japan

Last updated: August 21, 2025

Osaka, Japan, in December presents a cool and refreshing climate as temperatures fluctuate between a maximum of 22°C (71°F) and a minimum of -1°C (30°F), with an average temperature around 8°C (47°F). During this month, residents and visitors alike can expect approximately 57 mm (2.2 in) of precipitation spread over 6 days, contributing to a humid atmosphere with an average humidity level of 83%. This weather combination marks December as a time to embrace cozy attire while enjoying the unique charm of Osaka in winter.

December Temperature in Osaka

As December unfolds in Osaka, Japan, a noticeable chill sets in, marking the transition into winter. With minimum temperatures dipping to -1°C (30°F) and averaging around 8°C (47°F), the city experiences a crispness that invites cozy layers and warm drinks. However, the charm of the season is highlighted by occasional daytime highs reaching up to 22°C (71°F), providing a perfect backdrop for festive activities and holiday markets. The gradual drop in temperature from the milder autumn months not only reshapes the landscape but also shifts the locals' attire, as they trade lighter clothing for warmer garments. This blend of cool and pleasant days signifies December as a time of transition, where the vibrant energy of Osaka meets the tranquil beauty of winter.

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

The chart illustrates December temperature patterns in Osaka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Osaka, 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).
JanFebMarAprMayJunJulAugSepOctNovDec424351596874828577675647
Data source: Temperature data for Osaka 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 Osaka

In December, Osaka experiences a moderate precipitation amount of 57 mm (2.2 in) over approximately 6 days of rainfall. This represents a slight increase from November's meager 44 mm (1.7 in), showcasing a subtle transition into the winter season. The overall pattern of precipitation throughout the year reveals a significant spike during the summer months, particularly in July, which boasts a hefty 282 mm (11.1 in). As the year winds down, the rainfall begins to taper off, reflecting a drier trend in late autumn to early winter. This December precipitation level contrasts sharply with the heavier rains of earlier months, such as May and October, hinting at a period of relative calm before the cold of winter truly sets in.

December Precipitation Trends in Osaka

The chart displays monthly precipitation patterns in Osaka, 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 Osaka, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec46601091351501472821831692304457
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Osaka

In Osaka, Japan, December brings relatively consistent humidity levels, maintaining at a comfortable 83%. The month stands out as a transitional point, where the humidity begins to settle after peaking in the sweltering summer months—July and August, which boast a staggering 93% and 91% humidity, respectively. As the year progresses, the trend shows a gradual decline from the highs of early summer, dipping to the lower 70s% in spring, before stabilizing in the high 80s% by December. This pattern highlights Osaka's fluctuating climate as it shifts from the intense moisture of summer to a more moderate feel in winter, making December a remarkably pleasant time for those who appreciate a balanced atmosphere.

December Average Humidity in Osaka

This chart illustrates the average monthly humidity levels in Osaka, 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 Osaka is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%74%76%83%87%93%91%87%85%83%83%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Osaka

As December rolls into Osaka, the UV Index sees a notable decrease to 3, placing it in the moderate exposure category. This is a refreshing shift from the extreme levels experienced in the preceding summer months, where values soared to 12. With a burn time of 30 minutes, December offers a safer outdoor experience, making it a comfortable time for strolls and holiday festivities. This contrast highlights the significant seasonal fluctuations in UV exposure in Osaka, encouraging residents and visitors alike to adapt their sun protection strategies accordingly. For more detailed information, check out the Osaka UV Index.

Maximum UV Index Levels in Osaka for December

The chart shows the monthly maximum UV Index (UVI) for Osaka 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 Osaka typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468111111121110753
Data source: Osaka 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 Osaka

As December arrives in Osaka, Japan, the city experiences a gentle decrease in sunshine hours, totaling 221 hours for the month. While this is a dip compared to the sun-drenched summer months, December still embraces a significant amount of daylight, especially when compared to the colder, darker January, which sees only 185 hours. This seasonal shift highlights a trend of diminishing sunlight as the year winds down, but it remains brighter than the earlier chillier months. The gradual decline from the summer peak of 305 hours in August signals a cozy transition into winter, making December a serene time to enjoy Osaka’s festive lights against a cooler backdrop. Despite the shorter days, the city's charm shines through, inviting both locals and visitors to partake in the warmth of the season.

Monthly Sunshine Duration in Osaka: December Highlighted

The December sunshine duration represents the total number of hours Osaka 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.
JanFebMarAprMayJunJulAugSepOctNovDec185h229h265h279h291h268h258h305h242h237h236h221h
Data source: Osaka December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Osaka During December

December in Osaka, Japan, brings a refreshing twist to the year-end weather, boasting a notable 57% chance of sunny days. This marks a significant upward trend compared to the preceding months, particularly the 52% in November and 53% in October. It's interesting to see how December stands out amidst the colder winter months, often characterized by reduced sunlight. While the chances of sunshine can fluctuate throughout the year, December offers a glimmer of brightness, contrasting with the gloomier vibes of the later autumn and early winter. So, if you're planning a trip during this festive season, you might just catch some delightful sunny spells to enhance your experience!

Percentage of Sunny Days in December in Osaka

The chart illustrates the percentage of sunny days in Osaka 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 Osaka experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec49%52%41%45%29%24%32%28%30%53%52%57%
Data source: Osaka December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Osaka in December

As the year comes to a close, Osaka experiences a notable decline in daylight during December, with only 9 hours of sunlight. This marks the lowest duration of the year, following a gradual decrease from January and February, where daylight is a steady 10 hours. The longer days of spring and summer, which peak at 14 hours in June and July, feel like a distant memory as the autumn months transition into winter. By the time December arrives, the shorter days serve as a gentle reminder of the approaching winter solstice, making each hour of light precious as it sustains the city's vibrant life through the cooler months.

Average Daylight Hours in Osaka for December

The chart illustrates the variation in daylight duration in Osaka throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 5m10h 54m11h 58m13h 3m13h 58m14h 25m14h 12m13h 24m12h 21m11h 16m10h 20m9h 51m
Data source: Osaka daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Osaka

As December settles over Osaka, a noticeable shift in the wind patterns emerges. The average wind speed rises to 2.8 m/s (6 mph), marking a subtle rejuvenation compared to the calmer summer months, where winds dipped to their lowest in June and July at 1.8 m/s (4 mph). This seasonal change signals a transition, as the winds breathe life into the crisp winter air, providing a refreshing contrast to the stillness of autumn. Interestingly, December’s winds are slightly more robust than those of the preceding months, hinting at the approach of winter's chill yet allowing for a gentle, invigorating breeze that enhances the city's vibrant ambiance. Overall, the wind trends reflect a rhythmic dance, echoing the changing seasons of Osaka.

Average December Wind Speed in Osaka

The chart displays monthly wind speed patterns in Osaka, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.93.12.72.72.71.82.02.42.22.22.32.8 m/s
Data source: Osaka December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Osaka Compares to Other Months

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

December and January exhibit relatively similar weather patterns, though January tends to be slightly cooler overall. In December, temperatures fluctuate from a minimum of -1°C (30°F) to a maximum of 22°C (71°F), with an average temperature of 8°C (47°F). Precipitation is recorded at 57 mm (2.2 in) over six days, accompanied by a humidity level of 83%. In contrast, January features a lower temperature range, with minimum temperatures dropping to -3°C (26°F) and maximums peaking at 18°C (64°F), while the average temperature is 6°C (42°F). Precipitation in January is also lower at 46 mm (1.8 in), maintaining the same six days of rainfall, but with slightly reduced humidity at 82%. For more detailed insights into January's weather, you can visit Osaka weather in January.

In December, the weather tends to be slightly milder, with average temperatures around 8°C (47°F), while February experiences a cooler average of 6°C (43°F). December sees maximum temperatures reaching up to 22°C (71°F), compared to a maximum of 20°C (68°F) in February. Precipitation levels are fairly similar, with December totaling 57 mm (2.2 in) and February slightly higher at 60 mm (2.3 in), both occurring over 6 days. Humidity levels are also slightly higher in December at 83%, compared to 79% in February. For more detailed insights, check out Osaka weather in February.

In comparing the weather between December and March, we see notable differences in temperature and precipitation. December typically has a maximum temperature of 22°C (71°F) and an average of 8°C (47°F), while March shows a slight increase in average temperature to 10°C (51°F) and a maximum of 23°C (73°F). Precipitation also varies significantly; December receives 57 mm (2.2 in) over about 6 days, whereas March experiences a much wetter pattern with 109 mm (4.3 in) across 11 days. Additionally, March has a lower humidity level at 74%, compared to December's higher 83%. For more details on March weather, check out Osaka weather in March.

December and April present distinctly different weather patterns. December typically experiences cooler temperatures, with a minimum of -1°C (30°F) and an average of 8°C (47°F), peaking at 22°C (71°F). It also features a higher humidity level of 83% and receives about 57 mm (2.2 in) of precipitation over six days. In contrast, April marks the arrival of milder weather, with temperatures ranging from a minimum of 3°C (37°F) to an average of 15°C (59°F), and reaching a maximum of 26°C (79°F). Although April is warmer, it sees increased rainfall, accumulating 135 mm (5.3 in) over ten days, with humidity levels slightly lower at 76%. For more details on April weather, check out Osaka weather in April.

December weather is characterized by cooler temperatures, with a minimum of -1°C (30°F) and an average of 8°C (47°F), while the maximum can reach up to 22°C (71°F). The month sees about 57 mm (2.2 in) of precipitation over approximately 6 days, maintaining a consistent humidity of 83%. In contrast, May experiences a more warming climate, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 31°C (88°F), averaging 20°C (69°F). However, May is also wetter, receiving 150 mm (5.9 in) of rainfall across about 10 days, yet the humidity remains the same at 83%. For a detailed look at what to expect, check out Osaka weather in May.

In December, the weather is much cooler, with average temperatures ranging from a chilly 1°C (30°F) at night to a mild 22°C (71°F) during the day, and a total precipitation of 57 mm (2.2 in) spread over six days. The humidity level is relatively high at 83%, contributing to a brisk feel. Conversely, June brings significantly warmer temperatures, with nighttime lows of 14°C (58°F) and daytime highs reaching 32°C (89°F). This month is also much wetter, as it sees around 147 mm (5.8 in) of rain over twelve days, and humidity levels rise slightly to 87%. For a detailed look at the June weather conditions, visit Osaka weather in June.

December and July present strikingly different weather patterns. In December, temperatures range from a chilly minimum of -1°C (30°F) to a comfortable average of 8°C (47°F), with a maximum of 22°C (71°F). The month sees relatively low precipitation, totaling 57 mm (2.2 in) over just six days, accompanied by a humidity level of 83%. In contrast, July offers a much warmer climate, with minimum temperatures starting at 20°C (69°F) and peaking at a scorching maximum of 37°C (99°F) and an average of 28°C (82°F). However, July is also characterized by heavy rainfall, accumulating 282 mm (11.1 in) across 18 days and a humidity level of 93%. For more details on the specifics of July weather, you can explore Osaka weather in July.

In December, temperatures in Osaka typically range from a chilly minimum of -1°C (30°F) to a comfortable maximum of 22°C (71°F), with an average temperature of around 8°C (47°F). The month sees about 57 mm (2.2 in) of precipitation over approximately 6 days, with humidity levels at 83%. In stark contrast, August brings significantly warmer weather, with minimum temperatures around 19°C (66°F) and maximums soaring up to 38°C (101°F), averaging about 29°C (85°F). However, this heat comes with increased rainfall, totaling 183 mm (7.2 in) over about 12 days, and higher humidity at 91%. For a more detailed look at August weather patterns, you can visit Osaka weather in August.

In December, the weather features a significant cool-down, with temperatures ranging from a minimum of -1°C (30°F) to a maximum of 22°C (71°F) and an average of 8°C (47°F). The month sees around 57 mm (2.2 in) of precipitation over approximately 6 days, while humidity is relatively high at 83%. In contrast, September boasts much warmer temperatures, with a minimum of 15°C (59°F), an average of 25°C (78°F), and a maximum reaching up to 37°C (99°F). However, it is also a wetter month, receiving 169 mm (6.7 in) of rainfall spread over 15 days and slightly higher humidity at 87%. For more details, check out Osaka weather in September.

In comparing the weather between December and October, it's clear that December experiences significantly cooler temperatures, with a minimum of -1°C (30°F) and a maximum of 22°C (71°F), while October boasts a much warmer range, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 33°C (91°F). Precipitation is also notably different; December sees 57 mm (2.2 in) over just 6 days, compared to October's much wetter conditions with 230 mm (9.0 in) spread over 12 days. Additionally, while both months have high humidity levels, October's humidity is slightly higher at 85%, compared to December's 83%. For more details, you can check Osaka weather in October.

In comparing the weather between November and December, November tends to be milder, with temperatures ranging from a minimum of 2°C (35°F) to a maximum of 25°C (78°F) and an average of 13°C (56°F). In contrast, December experiences cooler temperatures, with a minimum of -1°C (30°F) and an average of 8°C (47°F), reaching a maximum of 22°C (71°F). Precipitation is also slightly higher in December, with 57 mm (2.2 in) over 6 days, compared to November's 44 mm (1.7 in) during the same number of days. Despite the decrease in temperature, both months share a consistent humidity level of 83%. For more details on November's weather, you can visit Osaka weather in November.

Compare Osaka's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Osaka

As December rolls into Osaka, the city experiences a notable shift in its weather compared to the warmer months. With temperatures dropping to a refreshing average of 8°C (47°F), it’s a time when the cool air invites cozy gatherings and festive celebrations. While the maximum can reach a pleasant 22°C (71°F), chilly nights can bring temperatures down to a brisk -1°C (30°F). December also sees an increase in humidity levels at 83%, which combined with 57 mm (2.2 in) of precipitation spread over 6 days, adds a unique charm to the city's winter atmosphere. For those looking to plan a visit and enjoy seasonal activities, understanding the nuances of the month can provide the perfect backdrop—discover more about it at Osaka Climate.