December Weather in Joyo, Japan

Last updated: August 23, 2025

In December, the average temperature in Joyo, Japan hovers around 8°C (46°F), with a minimum dipping to -2°C (28°F) and a maximum reaching 23°C (74°F). Expect a precipitation amount of 55 mm (2.2 in) over about 6 days, and prepare for a relatively high average humidity of 83%.

December Temperature in Joyo

In December, in Joyo, the average temperature is 8°C (46°F). The maximum can reach 23°C (74°F), while the minimum can dip as low as -2°C (28°F). Make sure to pack layers to comfortably enjoy your travels in this diverse climate!

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

The chart illustrates December temperature patterns in Joyo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Joyo, December typically has an average temperature of 8°C (46°F), with highs reaching up to 23°C (74°F) and lows dropping to around -2°C (28°F).

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

December Precipitation in Joyo

In Joyo in December, the total precipitation amount is 55 mm (2.2 in) spread over 6 days.

December Precipitation Trends in Joyo

The chart displays monthly precipitation patterns in Joyo, 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 Joyo, December typically receives around 55 mm (2.2 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 Joyo

In Joyo in December, humidity is 83%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill that seeps into your bones, making even short outings feel quite uncomfortable and prompting travelers to bundle up and seek shelter more frequently.

December Average Humidity in Joyo

This chart illustrates the average monthly humidity levels in Joyo, 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 Joyo is approximately 83%, 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 Joyo

In Joyo 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 Joyo, you can check the information here.

Maximum UV Index Levels in Joyo for December

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

Data source: Joyo 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 Joyo Compares to Other Months

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

This table compares monthly weather conditions in Joyo, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	48 mm (1.9 inches)	82%	moderate
February Weather	6°C (43°F)	60 mm (2.4 inches)	79%	high
March Weather	10°C (51°F)	110 mm (4.3 inches)	74%	very high
April Weather	15°C (59°F)	129 mm (5.1 inches)	76%	extreme
May Weather	20°C (68°F)	144 mm (5.7 inches)	83%	extreme
June Weather	24°C (75°F)	140 mm (5.5 inches)	87%	extreme
July Weather	28°C (82°F)	245 mm (9.7 inches)	93%	extreme
August Weather	29°C (85°F)	150 mm (5.9 inches)	91%	extreme
September Weather	25°C (78°F)	142 mm (5.6 inches)	87%	very high
October Weather	19°C (67°F)	226 mm (8.9 inches)	85%	high
November Weather	13°C (56°F)	40 mm (1.6 inches)	83%	moderate
December Weather	8°C (46°F)	55 mm (2.2 inches)	83%	moderate