December Weather in Asago, Japan

Last updated: August 23, 2025

In December, the average temperature in Asago, Japan hovers around 5°C (41°F). Expect a chilling minimum of -8°C (18°F) and a pleasant maximum of 20°C (67°F). With 89 mm (3.5 in) of precipitation spread over 15 days, you might want to keep an umbrella handy. Moreover, the air is notably humid, with an average humidity of 82%, making for a rather damp atmosphere.

December Temperature in Asago

In December in Asago, the average temperature is 5°C (41°F). Maximums can reach 20°C (67°F), and minimums can drop as low as -8°C (18°F). Be sure to dress in layers to accommodate the wide range of temperatures during your travels.

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

The chart illustrates December temperature patterns in Asago, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Asago, December typically has an average temperature of 5°C (41°F), with highs reaching up to 20°C (67°F) and lows dropping to around -8°C (18°F).

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

December Precipitation in Asago

In Asago in December, the precipitation amount is 89 mm (3.5 in) during 15 days of the month.

December Precipitation Trends in Asago

The chart displays monthly precipitation patterns in Asago, 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 Asago, December typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 15 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 Asago

In Asago in December, humidity is 82%. With an average temperature of 5°C (41°F), this humidity feels like a chilly, damp blanket wrapping around you, making outdoor activities less enjoyable and making it essential to dress in layers to stay warm while navigating the wet conditions.

December Average Humidity in Asago

This chart illustrates the average monthly humidity levels in Asago, 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 Asago is approximately 82%, 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 Asago

In Asago 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 Asago, you can check the information here.

Maximum UV Index Levels in Asago for December

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

Data source: Asago 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 Asago Compares to Other Months

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

This table compares monthly weather conditions in Asago, 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 (36°F)	68 mm (2.7 inches)	82%	moderate
February Weather	3°C (38°F)	72 mm (2.8 inches)	79%	high
March Weather	7°C (46°F)	134 mm (5.3 inches)	73%	very high
April Weather	12°C (54°F)	142 mm (5.6 inches)	74%	very high
May Weather	17°C (63°F)	148 mm (5.8 inches)	84%	extreme
June Weather	21°C (69°F)	219 mm (8.6 inches)	86%	extreme
July Weather	25°C (77°F)	376 mm (14.8 inches)	92%	extreme
August Weather	26°C (80°F)	310 mm (12.2 inches)	92%	extreme
September Weather	22°C (72°F)	279 mm (11.0 inches)	87%	very high
October Weather	16°C (62°F)	236 mm (9.3 inches)	85%	high
November Weather	10°C (50°F)	58 mm (2.3 inches)	84%	moderate
December Weather	5°C (41°F)	89 mm (3.5 inches)	82%	moderate