December Weather in Aki, Japan

Last updated: August 23, 2025

In December, the average temperature in Aki, Japan hovers around 9°C (49°F). Expect a range where the minimum can dip to 0°C (33°F) and the maximum can reach up to 20°C (68°F). This month, you can also anticipate 74 mm (2.9 in) of precipitation over about 6 days, coupled with an average humidity of 77%.

December Temperature in Aki

In December in Aki, the average temperature is 9°C (49°F), with maximums reaching up to 20°C (68°F) and minimums dropping as low as 0°C (33°F). It's a great time to pack layers to enjoy the mild weather and prepare for cooler evenings while exploring the region.

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

The chart illustrates December temperature patterns in Aki, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Aki, December typically has an average temperature of 9°C (49°F), with highs reaching up to 20°C (68°F) and lows dropping to around 0°C (33°F).

Data source: Temperature data for Aki generated using information from the Copernicus Climate Change Service.

December Precipitation in Aki

In Aki in December, the total precipitation amount is 74 mm (2.9 in), spread over a period of 6 days.

December Precipitation Trends in Aki

The chart displays monthly precipitation patterns in Aki, 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 Aki, December typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Aki

In Aki in December humidity is 77%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making outdoor explorations feel colder and more uncomfortable than the thermometer suggests.

December Average Humidity in Aki

This chart illustrates the average monthly humidity levels in Aki, 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 Aki is approximately 77%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Aki

In Aki in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Aki for better planning.

Maximum UV Index Levels in Aki for December

The chart shows the monthly maximum UV Index (UVI) for Aki 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 Aki typically reaches 4, which falls under the moderate exposure category.

Data source: Aki 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.

How December Weather in Aki Compares to Other Months

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

This table compares monthly weather conditions in Aki, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	71 mm (2.8 inches)	74%	moderate
February Weather	7°C (45°F)	98 mm (3.8 inches)	70%	high
March Weather	11°C (52°F)	169 mm (6.7 inches)	70%	very high
April Weather	15°C (59°F)	197 mm (7.8 inches)	76%	extreme
May Weather	19°C (66°F)	242 mm (9.5 inches)	82%	extreme
June Weather	22°C (71°F)	318 mm (12.5 inches)	86%	extreme
July Weather	25°C (77°F)	545 mm (21.5 inches)	91%	extreme
August Weather	27°C (80°F)	349 mm (13.8 inches)	88%	extreme
September Weather	24°C (76°F)	315 mm (12.4 inches)	85%	very high
October Weather	20°C (67°F)	296 mm (11.6 inches)	82%	very high
November Weather	14°C (58°F)	72 mm (2.8 inches)	79%	high
December Weather	9°C (49°F)	74 mm (2.9 inches)	77%	moderate