December Weather in Toyoshina, Japan

Last updated: August 23, 2025

In December, the average temperature in Toyoshina, Japan hovers around 1°C (34°F). Expect chilly conditions with lows reaching -9°C (17°F) and highs peaking at 17°C (62°F). With 109 mm (4.3 in) of precipitation spread across 16 days, you'll want to be prepared for some rain. The air remains quite damp, with an average humidity of 86%, adding to the overall brisk atmosphere.

December Temperature in Toyoshina

In December in Toyoshina, the average temperature is 1°C (34°F), with maximums reaching 17°C (62°F) and minimums dipping as low as -9°C (17°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for a comfortable experience.

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

The chart illustrates December temperature patterns in Toyoshina, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Toyoshina, December typically has an average temperature of 1°C (34°F), with highs reaching up to 17°C (62°F) and lows dropping to around -9°C (17°F).

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

December Precipitation in Toyoshina

In Toyoshina in December, the precipitation amount is 109 mm (4.3 in) spread over 16 days.

December Precipitation Trends in Toyoshina

The chart displays monthly precipitation patterns in Toyoshina, 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 Toyoshina, December typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 16 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 Toyoshina

In Toyoshina in December, humidity is 86%. With an average temperature of 1°C (34°F), this humidity feels like a chilling embrace, making outdoor adventures brisk and invigorating but challenging for travel.

December Average Humidity in Toyoshina

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

In Toyoshina in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Toyoshina for better planning.

Maximum UV Index Levels in Toyoshina for December

The chart shows the monthly maximum UV Index (UVI) for Toyoshina 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 Toyoshina typically reaches 4, which falls under the moderate exposure category.

Data source: Toyoshina 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 Toyoshina Compares to Other Months

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

This table compares monthly weather conditions in Toyoshina, 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 (28°F)	99 mm (3.9 inches)	88%	moderate
February Weather	-1°C (30°F)	97 mm (3.8 inches)	86%	high
March Weather	4°C (40°F)	152 mm (6.0 inches)	81%	very high
April Weather	9°C (48°F)	156 mm (6.1 inches)	78%	very high
May Weather	15°C (59°F)	179 mm (7.0 inches)	81%	extreme
June Weather	18°C (65°F)	194 mm (7.7 inches)	88%	extreme
July Weather	22°C (72°F)	333 mm (13.1 inches)	92%	extreme
August Weather	23°C (75°F)	197 mm (7.8 inches)	92%	extreme
September Weather	19°C (66°F)	222 mm (8.7 inches)	89%	very high
October Weather	13°C (56°F)	255 mm (10.1 inches)	87%	high
November Weather	7°C (44°F)	83 mm (3.3 inches)	85%	moderate
December Weather	1°C (34°F)	109 mm (4.3 inches)	86%	moderate