December Weather in Shiraoi, Japan

Last updated: August 23, 2025

In December, the average temperature in Shiraoi, Japan hovers around -1°C (30°F), with minimums plunging to -11°C (12°F) and maximums reaching 12°C (54°F). This month also experiences approximately 64 mm (2.5 in) of precipitation spread across 13 days, contributing to an average humidity of 80%. Prepare for a chilly yet captivating month!

December Temperature in Shiraoi

In December in Shiraoi, the average temperature is -1°C (30°F). The maximum can reach 12°C (54°F), while the minimum can drop as low as -11°C (12°F). Be sure to pack warm clothing and prepare for chilly conditions if you're traveling during this time.

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

The chart illustrates December temperature patterns in Shiraoi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Shiraoi, December typically has an average temperature of -1°C (30°F), with highs reaching up to 12°C (54°F) and lows dropping to around -11°C (12°F).

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

December Precipitation in Shiraoi

In Shiraoi in December, the precipitation amount is 64 mm (2.5 in) spread over 13 days.

December Precipitation Trends in Shiraoi

The chart displays monthly precipitation patterns in Shiraoi, 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 Shiraoi, December typically receives around 64 mm (2.5 inches) of precipitation spread over approximately 13 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 Shiraoi

In Shiraoi in December, humidity is 80%. With an average temperature of -1°C (30°F), this humidity feels like an uncomfortable chill that seeps into your bones, making outdoor activities less enjoyable and travel quite challenging.

December Average Humidity in Shiraoi

This chart illustrates the average monthly humidity levels in Shiraoi, 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 Shiraoi is approximately 80%, 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 Shiraoi

In Shiraoi in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Shiraoi, you can visit Hourly UV Index in Shiraoi.

Maximum UV Index Levels in Shiraoi for December

The chart shows the monthly maximum UV Index (UVI) for Shiraoi 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 Shiraoi typically reaches 2, which falls under the low exposure category.

Data source: Shiraoi 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 Shiraoi Compares to Other Months

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

This table compares monthly weather conditions in Shiraoi, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (26°F)	58 mm (2.3 inches)	84%	low
February Weather	-3°C (26°F)	53 mm (2.1 inches)	83%	moderate
March Weather	1°C (34°F)	88 mm (3.5 inches)	81%	moderate
April Weather	5°C (42°F)	96 mm (3.8 inches)	81%	high
May Weather	10°C (51°F)	92 mm (3.6 inches)	86%	very high
June Weather	14°C (58°F)	131 mm (5.2 inches)	87%	very high
July Weather	18°C (66°F)	113 mm (4.4 inches)	93%	very high
August Weather	20°C (68°F)	194 mm (7.6 inches)	95%	very high
September Weather	18°C (64°F)	142 mm (5.6 inches)	88%	very high
October Weather	12°C (54°F)	140 mm (5.5 inches)	83%	high
November Weather	6°C (43°F)	107 mm (4.2 inches)	79%	moderate
December Weather	-1°C (30°F)	64 mm (2.5 inches)	80%	low