May Weather in Kainan, Japan

Last updated: August 23, 2025

In May, the average temperature in Kainan, Japan is a pleasant 19°C (67°F). However, it can fluctuate between a cool 8°C (47°F) and a warm 28°C (82°F). Expect 164 mm (6.5 in) of precipitation spread over 10 days, contributing to an average humidity level of 83%.

May Temperature in Kainan

In May in Kainan, the average temperature is 19°C (67°F), with maximums often reaching 28°C (82°F) and minimums dipping as low as 8°C (47°F). This pleasant weather makes it an ideal time for travelers to explore and enjoy outdoor activities in Kainan.

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

The chart illustrates May temperature patterns in Kainan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kainan, May typically has an average temperature of 19°C (67°F), with highs reaching up to 28°C (82°F) and lows dropping to around 8°C (47°F).

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

May Precipitation in Kainan

In Kainan in May, the precipitation amount is 164 mm (6.5 in) over the course of 10 days.

May Precipitation Trends in Kainan

The chart displays monthly precipitation patterns in Kainan, 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 Kainan, May typically receives around 164 mm (6.5 inches) of precipitation spread over approximately 10 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 Kainan

In Kainan in May humidity is 83%. With an average temperature of 19°C (67°F), this humidity feels like a warm, tropical blanket wrapping around you, making traveling feel a bit sluggish and sticky, yet still inviting as long as you stay hydrated and take breaks in the shade.

May Average Humidity in Kainan

This chart illustrates the average monthly humidity levels in Kainan, 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 Kainan is approximately 83%, 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 Kainan

In Kainan in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Kainan.

Maximum UV Index Levels in Kainan for May

The chart shows the monthly maximum UV Index (UVI) for Kainan 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 Kainan typically reaches 11, which falls under the extreme exposure category.

Data source: Kainan 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 Kainan Compares to Other Months

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

This table compares monthly weather conditions in Kainan, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (44°F)	63 mm (2.5 inches)	82%	moderate
February Weather	7°C (44°F)	76 mm (3.0 inches)	79%	moderate
March Weather	10°C (51°F)	115 mm (4.5 inches)	74%	very high
April Weather	14°C (58°F)	128 mm (5.1 inches)	76%	extreme
May Weather	19°C (67°F)	164 mm (6.5 inches)	83%	extreme
June Weather	22°C (72°F)	199 mm (7.8 inches)	87%	extreme
July Weather	26°C (80°F)	302 mm (11.9 inches)	93%	extreme
August Weather	28°C (83°F)	178 mm (7.0 inches)	91%	extreme
September Weather	25°C (77°F)	203 mm (8.0 inches)	87%	very high
October Weather	20°C (67°F)	267 mm (10.5 inches)	85%	high
November Weather	14°C (57°F)	63 mm (2.5 inches)	83%	moderate
December Weather	9°C (48°F)	76 mm (3.0 inches)	83%	moderate