December Weather in Saku, Japan

Last updated: August 23, 2025

In December, the average temperature in Saku, Japan hovers around 2°C (36°F). Expect a chilly minimum of -7°C (19°F) and a comfortable maximum of 19°C (66°F). During this month, you can anticipate about 50 mm (2.0 in) of precipitation spread over 8 days, alongside an average humidity level of 86%. Stay warm and prepared!

December Temperature in Saku

In December in Saku, the average temperature is 2°C (36°F). The maximum can reach 19°C (66°F) while the minimum can be as low as -7°C (19°F). Be prepared for a wide range of temperatures when traveling to Saku during this time.

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

The chart illustrates December temperature patterns in Saku, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saku, December typically has an average temperature of 2°C (36°F), with highs reaching up to 19°C (66°F) and lows dropping to around -7°C (19°F).

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

December Precipitation in Saku

In Saku in December, the total precipitation amount is 50 mm (2.0 in) spread over 8 days.

December Precipitation Trends in Saku

The chart displays monthly precipitation patterns in Saku, 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 Saku, December typically receives around 50 mm (2.0 inches) of precipitation spread over approximately 8 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 Saku

In Saku in December, humidity is 86%. With an average temperature of 2°C (36°F), this humidity feels like a biting chill that clings to your skin, making outdoor exploration uncomfortable and dampening any enthusiasm for travel.

December Average Humidity in Saku

This chart illustrates the average monthly humidity levels in Saku, 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 Saku 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 Saku

In Saku 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 Saku, you can check the information here.

Maximum UV Index Levels in Saku for December

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

Data source: Saku 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 Saku Compares to Other Months

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

This table compares monthly weather conditions in Saku, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (31°F)	48 mm (1.9 inches)	88%	moderate
February Weather	1°C (33°F)	49 mm (1.9 inches)	86%	high
March Weather	5°C (41°F)	106 mm (4.2 inches)	81%	very high
April Weather	9°C (49°F)	105 mm (4.1 inches)	78%	very high
May Weather	15°C (59°F)	142 mm (5.6 inches)	81%	extreme
June Weather	18°C (65°F)	193 mm (7.6 inches)	88%	extreme
July Weather	22°C (72°F)	287 mm (11.3 inches)	92%	extreme
August Weather	23°C (75°F)	190 mm (7.5 inches)	92%	extreme
September Weather	19°C (66°F)	185 mm (7.3 inches)	89%	very high
October Weather	13°C (56°F)	253 mm (9.9 inches)	87%	high
November Weather	7°C (45°F)	38 mm (1.5 inches)	85%	moderate
December Weather	2°C (36°F)	50 mm (2.0 inches)	86%	moderate