May Weather in Hamatonbetsu, Japan

Last updated: August 23, 2025

In May, the average temperature in Hamatonbetsu, Japan hovers around 8°C (46°F). Expect a range between a chilly 1°C (34°F) and a pleasant 18°C (65°F). Be prepared for wet weather, as precipitation can reach 83 mm (3.3 in) over about 11 days, with average humidity levels at a high 88%.

May Temperature in Hamatonbetsu

In May in Hamatonbetsu, the average temperature is 8°C (46°F). The maximum can reach 18°C (65°F), and the minimum can be as low as 1°C (34°F). Be sure to pack layers to stay comfortable throughout the day!

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

The chart illustrates May 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, May typically has an average temperature of 8°C (46°F), with highs reaching up to 18°C (65°F) and lows dropping to around 1°C (34°F).

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

May Precipitation in Hamatonbetsu

In Hamatonbetsu in May, the precipitation amount is 83 mm (3.3 in) over the course of 11 days.

May Precipitation Trends in Hamatonbetsu

The chart displays monthly precipitation patterns in Hamatonbetsu, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Hamatonbetsu, May typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 11 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in Hamatonbetsu

In Hamatonbetsu in May, humidity is 88%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration feel much more uncomfortable than the temperature alone would suggest.

May Average Humidity in Hamatonbetsu

This chart illustrates the average monthly humidity levels in Hamatonbetsu, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Hamatonbetsu is approximately 88%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Hamatonbetsu

In Hamatonbetsu in May, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Hamatonbetsu.

Maximum UV Index Levels in Hamatonbetsu for May

The chart shows the monthly maximum UV Index (UVI) for Hamatonbetsu in May, 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 May, the maximum UV index in Hamatonbetsu typically reaches 8, which falls under the very high exposure category.

Data source: Hamatonbetsu May 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 May 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 May’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 May’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