May Weather in Tomakomai, Japan

Last updated: August 23, 2025

In Tomakomai, Japan, the average temperature in May hovers around 11°C (51°F). Expect temperatures to range from a cool 4°C (39°F) at its lowest to a pleasant 23°C (73°F) at the peak. Be prepared for some showers, with 90 mm (3.6 in) of precipitation spread over about 11 days. Additionally, the air remains quite humid, with an average humidity level of 86%.

May Temperature in Tomakomai

In May in Tomakomai, the average temperature is 11°C (51°F). The maximum can reach 23°C (73°F) and the minimum can be as low as 4°C (39°F). This mild weather makes Tomakomai a perfect destination for travelers looking to explore the area comfortably.

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

The chart illustrates May temperature patterns in Tomakomai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tomakomai, May typically has an average temperature of 11°C (51°F), with highs reaching up to 23°C (73°F) and lows dropping to around 4°C (39°F).

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

May Precipitation in Tomakomai

In Tomakomai in May, the precipitation amount is 90 mm (3.6 in) spread over 11 days.

May Precipitation Trends in Tomakomai

The chart displays monthly precipitation patterns in Tomakomai, 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 Tomakomai, May typically receives around 90 mm (3.6 inches) of precipitation spread over approximately 11 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Tomakomai

In Tomakomai in May humidity is 86%. With an average temperature of 11°C (51°F), this humidity feels like a damp blanket wrapping around you, making outdoor activities less enjoyable and travel a bit more strenuous as the air feels heavy and clammy.

May Average Humidity in Tomakomai

This chart illustrates the average monthly humidity levels in Tomakomai, 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 Tomakomai is approximately 86%, 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 Tomakomai

In Tomakomai 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 Tomakomai.

Maximum UV Index Levels in Tomakomai for May

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

Data source: Tomakomai 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 Tomakomai Compares to Other Months

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

This table compares monthly weather conditions in Tomakomai, 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)	49 mm (1.9 inches)	84%	low
February Weather	-4°C (26°F)	53 mm (2.1 inches)	83%	moderate
March Weather	1°C (34°F)	89 mm (3.5 inches)	81%	moderate
April Weather	5°C (42°F)	93 mm (3.7 inches)	81%	high
May Weather	11°C (51°F)	90 mm (3.6 inches)	86%	very high
June Weather	14°C (58°F)	128 mm (5.1 inches)	87%	very high
July Weather	19°C (66°F)	121 mm (4.7 inches)	93%	very high
August Weather	20°C (69°F)	206 mm (8.1 inches)	95%	very high
September Weather	18°C (64°F)	145 mm (5.7 inches)	88%	very high
October Weather	12°C (54°F)	143 mm (5.6 inches)	83%	moderate
November Weather	6°C (42°F)	102 mm (4.0 inches)	79%	moderate
December Weather	-1°C (30°F)	62 mm (2.4 inches)	80%	low