May Weather in Yanai, Japan

Last updated: August 23, 2025

In Yanai, Japan, the average temperature in May hovers around 18°C (65°F). You'll experience a pleasant range, with minimums dipping to 10°C (51°F) and maximums reaching up to 25°C (77°F). Expect about 159 mm (6.3 in) of precipitation over 8 days, contributing to a high humidity level of 84%.

May Temperature in Yanai

In May in Yanai, the average temperature is 18°C (65°F). Maximum temperatures can reach up to 25°C (77°F), while minimums can dip as low as 10°C (51°F). It's a comfortable time for traveling, so pack accordingly and enjoy the mild climate!

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

The chart illustrates May temperature patterns in Yanai, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yanai, May typically has an average temperature of 18°C (65°F), with highs reaching up to 25°C (77°F) and lows dropping to around 10°C (51°F).

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

May Precipitation in Yanai

In Yanai in May, the precipitation amount is 159 mm (6.3 in), occurring over the course of 8 days.

May Precipitation Trends in Yanai

The chart displays monthly precipitation patterns in Yanai, 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 Yanai, May typically receives around 159 mm (6.3 inches) of precipitation spread over approximately 8 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 Yanai

In Yanai in May, humidity is 84%. With an average temperature of 18°C (65°F), this humidity feels like a thick blanket enveloping you, making travel feel heavy and slightly uncomfortable as the air clings to your skin and limits your breath.

May Average Humidity in Yanai

This chart illustrates the average monthly humidity levels in Yanai, 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 Yanai is approximately 84%, 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 Yanai

In Yanai 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 Yanai.

Maximum UV Index Levels in Yanai for May

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

Data source: Yanai 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 Yanai Compares to Other Months

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

This table compares monthly weather conditions in Yanai, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	54 mm (2.1 inches)	75%	moderate
February Weather	7°C (45°F)	79 mm (3.1 inches)	71%	moderate
March Weather	11°C (51°F)	127 mm (5.0 inches)	71%	very high
April Weather	14°C (58°F)	146 mm (5.7 inches)	78%	extreme
May Weather	18°C (65°F)	159 mm (6.3 inches)	84%	extreme
June Weather	22°C (72°F)	189 mm (7.5 inches)	86%	extreme
July Weather	26°C (79°F)	355 mm (14.0 inches)	92%	extreme
August Weather	28°C (82°F)	221 mm (8.7 inches)	91%	extreme
September Weather	24°C (76°F)	215 mm (8.5 inches)	84%	very high
October Weather	20°C (68°F)	173 mm (6.8 inches)	83%	high
November Weather	15°C (59°F)	43 mm (1.7 inches)	81%	high
December Weather	9°C (49°F)	64 mm (2.5 inches)	79%	moderate