May Weather in Iyo, Japan

Last updated: August 23, 2025

In Iyo, Japan, the average temperature in May hovers around 18°C (65°F), with a minimum of 7°C (44°F) and a maximum reaching 28°C (82°F). Expect a bit of rain, as precipitation amounts average 153 mm (6.0 in) over 11 days, accompanied by an average humidity of 82%.

May Temperature in Iyo

In May, in Iyo, the average temperature is 18°C (65°F). Maximum temperatures can reach 28°C (82°F), while minimums can dip to as low as 7°C (44°F). This makes it a comfortable destination for travelers looking to enjoy mild weather and a variety of outdoor activities.

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

The chart illustrates May temperature patterns in Iyo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iyo, May typically has an average temperature of 18°C (65°F), with highs reaching up to 28°C (82°F) and lows dropping to around 7°C (44°F).

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

May Precipitation in Iyo

In Iyo in May, the total precipitation amount is 153 mm (6.0 in) over the course of 11 days.

May Precipitation Trends in Iyo

The chart displays monthly precipitation patterns in Iyo, 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 Iyo, May typically receives around 153 mm (6.0 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 Iyo

In Iyo in May, humidity is 82%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can quickly leave travelers feeling fatigued and in need of frequent breaks to stay refreshed and hydrated.

May Average Humidity in Iyo

This chart illustrates the average monthly humidity levels in Iyo, 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 Iyo is approximately 82%, 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 Iyo

In Iyo in May, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Iyo.

Maximum UV Index Levels in Iyo for May

The chart shows the monthly maximum UV Index (UVI) for Iyo 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 Iyo typically reaches 12, which falls under the extreme exposure category.

Data source: Iyo 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 Iyo Compares to Other Months

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

This table compares monthly weather conditions in Iyo, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (42°F)	60 mm (2.4 inches)	74%	moderate
February Weather	6°C (43°F)	90 mm (3.6 inches)	70%	high
March Weather	10°C (50°F)	129 mm (5.1 inches)	70%	very high
April Weather	14°C (57°F)	135 mm (5.3 inches)	76%	very high
May Weather	18°C (65°F)	153 mm (6.0 inches)	82%	extreme
June Weather	22°C (72°F)	215 mm (8.5 inches)	86%	extreme
July Weather	26°C (79°F)	374 mm (14.7 inches)	91%	extreme
August Weather	27°C (81°F)	197 mm (7.7 inches)	88%	extreme
September Weather	24°C (75°F)	212 mm (8.4 inches)	85%	extreme
October Weather	19°C (66°F)	204 mm (8.0 inches)	82%	very high
November Weather	13°C (55°F)	61 mm (2.4 inches)	79%	high
December Weather	8°C (46°F)	69 mm (2.7 inches)	77%	moderate