December Weather in Nanyo, Japan

Last updated: August 23, 2025

In December, the average temperature in Nanyo, Japan hovers around 0°C (33°F), with a minimum dropping to -12°C (11°F) and a maximum reaching 16°C (61°F). This month also sees 203 mm (8.0 in) of precipitation spread over 25 days, contributing to an average humidity of a brisk 86%. Prepare for a chilly and wet experience!

December Temperature in Nanyo

In December in Nanyo, the average temperature is 0°C (33°F). Maximums can reach 16°C (61°F), while minimums can drop to as low as -12°C (11°F). Be prepared for chilly weather and pack layers if you're planning to travel during this time.

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

The chart illustrates December temperature patterns in Nanyo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nanyo, December typically has an average temperature of 0°C (33°F), with highs reaching up to 16°C (61°F) and lows dropping to around -12°C (11°F).

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

December Precipitation in Nanyo

In Nanyo in December, the precipitation amount is 203 mm (8.0 in) spread over 25 days.

December Precipitation Trends in Nanyo

The chart displays monthly precipitation patterns in Nanyo, 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 Nanyo, December typically receives around 203 mm (8.0 inches) of precipitation spread over approximately 25 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 Nanyo

In Nanyo in December humidity is 86%. With an average temperature of 0°C (33°F), this humidity feels like a damp chill that permeates your clothes, making traveling uncomfortable and necessitating warm, layered clothing to stay dry and cozy.

December Average Humidity in Nanyo

This chart illustrates the average monthly humidity levels in Nanyo, 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 Nanyo is approximately 86%, 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 Nanyo

In Nanyo in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Nanyo, you can check the information here.

Maximum UV Index Levels in Nanyo for December

The chart shows the monthly maximum UV Index (UVI) for Nanyo 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 Nanyo typically reaches 3, which falls under the moderate exposure category.

Data source: Nanyo 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 Nanyo Compares to Other Months

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

This table compares monthly weather conditions in Nanyo, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (28°F)	169 mm (6.6 inches)	88%	moderate
February Weather	-2°C (29°F)	167 mm (6.6 inches)	86%	moderate
March Weather	2°C (36°F)	153 mm (6.0 inches)	81%	very high
April Weather	8°C (46°F)	138 mm (5.4 inches)	78%	very high
May Weather	14°C (58°F)	120 mm (4.7 inches)	81%	very high
June Weather	18°C (64°F)	135 mm (5.3 inches)	88%	extreme
July Weather	22°C (72°F)	298 mm (11.7 inches)	92%	extreme
August Weather	23°C (74°F)	221 mm (8.7 inches)	92%	extreme
September Weather	19°C (66°F)	140 mm (5.5 inches)	89%	very high
October Weather	13°C (55°F)	164 mm (6.5 inches)	87%	high
November Weather	7°C (44°F)	118 mm (4.7 inches)	85%	moderate
December Weather	0°C (33°F)	203 mm (8.0 inches)	86%	moderate