December Weather in Nanjo, Japan

Last updated: August 23, 2025

In Nanjo, Japan, the average temperature in December hovers around 20°C (69°F), making it a delightful time to explore. Expect pleasant conditions with minimum temperatures dipping to 14°C (58°F) and highs reaching up to 25°C (78°F). However, be prepared for some rain, as 188 mm (7.4 in) of precipitation can occur over 16 days. With an average humidity of 75%, the air will feel quite comfortable, perfect for enjoying the stunning scenery!

December Temperature in Nanjo

In December in Nanjo, the average temperature is 20°C (69°F). Maximums can reach 25°C (78°F), while minimums can be as low as 14°C (58°F). This pleasant climate makes Nanjo a great destination for outdoor activities and sightseeing during this time of year.

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

The chart illustrates December temperature patterns in Nanjo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nanjo, December typically has an average temperature of 20°C (69°F), with highs reaching up to 25°C (78°F) and lows dropping to around 14°C (58°F).

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

December Precipitation in Nanjo

In Nanjo in December, the total precipitation amount is 188 mm (7.4 in), observed over a span of 16 days.

December Precipitation Trends in Nanjo

The chart displays monthly precipitation patterns in Nanjo, 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 Nanjo, December typically receives around 188 mm (7.4 inches) of precipitation spread over approximately 16 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

December Humidity in Nanjo

In Nanjo in December, humidity is 75%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping blanket, making travel a bit muggy and requiring frequent hydration breaks to stay comfortable while exploring.

December Average Humidity in Nanjo

This chart illustrates the average monthly humidity levels in Nanjo, 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 Nanjo is approximately 75%, 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 Nanjo

In Nanjo in December, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Nanjo, you can refer to this Hourly UV Index in Nanjo.

Maximum UV Index Levels in Nanjo for December

The chart shows the monthly maximum UV Index (UVI) for Nanjo 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 Nanjo typically reaches 6, which falls under the high exposure category.

Data source: Nanjo 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 Nanjo Compares to Other Months

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

This table compares monthly weather conditions in Nanjo, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	19°C (66°F)	91 mm (3.6 inches)	71%	high
February Weather	19°C (66°F)	97 mm (3.8 inches)	71%	very high
March Weather	20°C (68°F)	107 mm (4.2 inches)	76%	extreme
April Weather	21°C (71°F)	137 mm (5.4 inches)	82%	extreme
May Weather	24°C (76°F)	208 mm (8.2 inches)	84%	extreme
June Weather	26°C (80°F)	302 mm (11.9 inches)	86%	extreme
July Weather	28°C (83°F)	192 mm (7.6 inches)	86%	extreme
August Weather	28°C (83°F)	205 mm (8.1 inches)	82%	extreme
September Weather	28°C (82°F)	253 mm (10.0 inches)	82%	extreme
October Weather	26°C (79°F)	160 mm (6.3 inches)	80%	very high
November Weather	23°C (74°F)	103 mm (4.1 inches)	79%	very high
December Weather	20°C (69°F)	188 mm (7.4 inches)	75%	high