December Weather in Hamatonbetsu, Japan

Last updated: August 23, 2025

In December, the average temperature in Hamatonbetsu, Japan hovers around -1°C (30°F), with minimums dipping as low as -9°C (16°F) and maximums reaching 9°C (48°F). Expect 129 mm (5.1 in) of precipitation spread over approximately 25 days, resulting in an average humidity level of 83%. Be prepared for a chilly, damp month ahead!

December Temperature in Hamatonbetsu

In December in Hamatonbetsu, the average temperature is -1°C (30°F), with maximums reaching 9°C (48°F) and minimums plummeting to -9°C (16°F). It’s advisable to dress warmly and prepare for cold conditions if you plan to visit during this time.

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

The chart illustrates December temperature patterns in Hamatonbetsu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hamatonbetsu, December typically has an average temperature of -1°C (30°F), with highs reaching up to 9°C (48°F) and lows dropping to around -9°C (16°F).

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

December Precipitation in Hamatonbetsu

In Hamatonbetsu in December, the total precipitation amount is 129 mm (5.1 in) occurring over the span of 25 days.

December Precipitation Trends in Hamatonbetsu

The chart displays monthly precipitation patterns in Hamatonbetsu, 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 Hamatonbetsu, December typically receives around 129 mm (5.1 inches) of precipitation spread over approximately 25 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 Hamatonbetsu

In Hamatonbetsu in December humidity is 83%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that seeps through your layers, making outdoor activities uncomfortable and encouraging travelers to seek shelter indoors.

December Average Humidity in Hamatonbetsu

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

In Hamatonbetsu 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 Hamatonbetsu, you can visit Hourly UV Index in Hamatonbetsu.

Maximum UV Index Levels in Hamatonbetsu for December

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

Data source: Hamatonbetsu 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 Hamatonbetsu Compares to Other Months

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

This table compares monthly weather conditions in Hamatonbetsu, 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 (25°F)	71 mm (2.8 inches)	87%	low
February Weather	-5°C (23°F)	55 mm (2.2 inches)	84%	moderate
March Weather	-1°C (31°F)	70 mm (2.7 inches)	83%	moderate
April Weather	4°C (39°F)	56 mm (2.2 inches)	84%	high
May Weather	8°C (46°F)	83 mm (3.3 inches)	88%	very high
June Weather	11°C (52°F)	92 mm (3.6 inches)	88%	very high
July Weather	16°C (61°F)	100 mm (3.9 inches)	93%	very high
August Weather	18°C (65°F)	164 mm (6.5 inches)	94%	very high
September Weather	17°C (63°F)	76 mm (3.0 inches)	86%	high
October Weather	12°C (54°F)	126 mm (5.0 inches)	79%	moderate
November Weather	5°C (41°F)	136 mm (5.4 inches)	77%	moderate
December Weather	-1°C (30°F)	129 mm (5.1 inches)	83%	low