May Weather in Okaya, Japan

Last updated: August 23, 2025

In May, the average temperature in Okaya, Japan hovers around 15°C (58°F). Expect a temperature range from a chilly -1°C (31°F) to a warm 29°C (85°F). During this month, precipitation is around 155 mm (6.1 in) spread over 12 days, resulting in an average humidity of 81%.

May Temperature in Okaya

In May in Okaya, the average temperature is 15°C (58°F). Maximums can reach 29°C (85°F), while minimums can drop as low as -1°C (31°F). Be prepared for a wide range of temperatures when planning your travel during this time.

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

The chart illustrates May temperature patterns in Okaya, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Okaya, May typically has an average temperature of 15°C (58°F), with highs reaching up to 29°C (85°F) and lows dropping to around -1°C (31°F).

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

May Precipitation in Okaya

In Okaya in May, the total precipitation amount reaches 155 mm (6.1 in) over the course of 12 days.

May Precipitation Trends in Okaya

The chart displays monthly precipitation patterns in Okaya, 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 Okaya, May typically receives around 155 mm (6.1 inches) of precipitation spread over approximately 12 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 Okaya

In Okaya in May humidity is 81%. With an average temperature of 15°C (58°F), this humidity feels like a mild, damp embrace that can make outdoor activities feel heavy and exhausting, requiring frequent breaks in the shade or a cool beverage to refresh yourself.

May Average Humidity in Okaya

This chart illustrates the average monthly humidity levels in Okaya, 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 Okaya is approximately 81%, 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 Okaya

In Okaya 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 Okaya.

Maximum UV Index Levels in Okaya for May

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

Data source: Okaya 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 Okaya Compares to Other Months

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

This table compares monthly weather conditions in Okaya, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (29°F)	75 mm (3.0 inches)	76%	moderate
February Weather	-1°C (30°F)	80 mm (3.2 inches)	74%	high
March Weather	4°C (40°F)	141 mm (5.6 inches)	70%	very high
April Weather	9°C (48°F)	143 mm (5.6 inches)	74%	very high
May Weather	15°C (58°F)	155 mm (6.1 inches)	81%	extreme
June Weather	18°C (65°F)	149 mm (5.8 inches)	88%	extreme
July Weather	22°C (72°F)	289 mm (11.4 inches)	93%	extreme
August Weather	23°C (74°F)	151 mm (5.9 inches)	90%	extreme
September Weather	19°C (66°F)	171 mm (6.7 inches)	86%	very high
October Weather	13°C (56°F)	237 mm (9.3 inches)	83%	high
November Weather	7°C (44°F)	66 mm (2.6 inches)	80%	moderate
December Weather	1°C (34°F)	84 mm (3.3 inches)	78%	moderate