December Weather in Ashiya, Japan

Last updated: August 23, 2025

In Ashiya, Japan, the average temperature in December hovers around 8°C (48°F), with a comfortable range from a cool 0°C (32°F) to a warm 20°C (68°F). Expect about 60 mm (2.3 in) of precipitation over 6 days, contributing to an average humidity of 83%. Perfect weather for cozy indoor activities or light outdoor exploration!

December Temperature in Ashiya

In December in Ashiya, the average temperature is 8°C (48°F). Maximums can reach 20°C (68°F) and minimums can be as low as 0°C (32°F). This climate makes it a versatile destination for travelers, offering mild days and cool evenings perfect for outdoor activities.

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

The chart illustrates December temperature patterns in Ashiya, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ashiya, December typically has an average temperature of 8°C (48°F), with highs reaching up to 20°C (68°F) and lows dropping to around 0°C (32°F).

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

December Precipitation in Ashiya

In Ashiya, in December, the precipitation amount is 60 mm (2.3 in) over a span of 6 days.

December Precipitation Trends in Ashiya

The chart displays monthly precipitation patterns in Ashiya, 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 Ashiya, December typically receives around 60 mm (2.3 inches) of precipitation spread over approximately 6 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 Ashiya

In Ashiya in December, humidity is 83%. With an average temperature of 8°C (48°F), this humidity feels like a damp chill that clings to your skin, making it essential to dress in layers and stay active to keep warm while exploring the sights.

December Average Humidity in Ashiya

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

In Ashiya 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 Ashiya, you can check the information here.

Maximum UV Index Levels in Ashiya for December

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

Data source: Ashiya 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 Ashiya Compares to Other Months

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

This table compares monthly weather conditions in Ashiya, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	45 mm (1.8 inches)	82%	moderate
February Weather	6°C (44°F)	57 mm (2.3 inches)	79%	high
March Weather	10°C (51°F)	109 mm (4.3 inches)	74%	very high
April Weather	15°C (59°F)	137 mm (5.4 inches)	76%	extreme
May Weather	20°C (68°F)	154 mm (6.0 inches)	83%	extreme
June Weather	23°C (74°F)	153 mm (6.0 inches)	87%	extreme
July Weather	27°C (81°F)	317 mm (12.5 inches)	93%	extreme
August Weather	29°C (84°F)	210 mm (8.3 inches)	91%	extreme
September Weather	25°C (77°F)	197 mm (7.8 inches)	87%	very high
October Weather	20°C (68°F)	235 mm (9.2 inches)	85%	high
November Weather	14°C (57°F)	47 mm (1.9 inches)	83%	moderate
December Weather	8°C (48°F)	60 mm (2.3 inches)	83%	moderate