May Weather in Sayama, Japan

Last updated: August 23, 2025

In May, the average temperature in Sayama, Japan is a comfortable 19°C (67°F). During this month, temperatures can range from a chilly 5°C (42°F) to a warm 31°C (89°F). Expect about 117 mm (4.6 in) of rainfall spread over 12 days, and prepare for humid conditions with an average humidity of 81%.

May Temperature in Sayama

In May in Sayama, the average temperature is 19°C (67°F). The maximum can reach 31°C (89°F), while the minimum can drop as low as 5°C (42°F). Be prepared for a range of temperatures to make the most of your travel experience.

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

The chart illustrates May temperature patterns in Sayama, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sayama, May typically has an average temperature of 19°C (67°F), with highs reaching up to 31°C (89°F) and lows dropping to around 5°C (42°F).

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

May Precipitation in Sayama

In Sayama in May, the total precipitation amount is 117 mm (4.6 in), occurring over a span of 12 days.

May Precipitation Trends in Sayama

The chart displays monthly precipitation patterns in Sayama, 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 Sayama, May typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 12 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 Sayama

In Sayama in May humidity is 81%. With an average temperature of 19°C (67°F), this humidity feels like a heavy blanket enveloping you, making travel somewhat uncomfortable as sweat clings to your skin and the air feels thick, prompting you to seek shade and hydration frequently.

May Average Humidity in Sayama

This chart illustrates the average monthly humidity levels in Sayama, 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 Sayama 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 Sayama

In Sayama 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 Sayama.

Maximum UV Index Levels in Sayama for May

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

Data source: Sayama 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 Sayama Compares to Other Months

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

This table compares monthly weather conditions in Sayama, 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 (40°F)	47 mm (1.8 inches)	76%	moderate
February Weather	6°C (42°F)	50 mm (2.0 inches)	74%	moderate
March Weather	10°C (50°F)	144 mm (5.7 inches)	70%	very high
April Weather	14°C (57°F)	126 mm (5.0 inches)	74%	very high
May Weather	19°C (67°F)	117 mm (4.6 inches)	81%	extreme
June Weather	22°C (72°F)	168 mm (6.6 inches)	88%	extreme
July Weather	26°C (79°F)	252 mm (9.9 inches)	93%	extreme
August Weather	28°C (82°F)	133 mm (5.3 inches)	90%	extreme
September Weather	23°C (74°F)	201 mm (7.9 inches)	86%	very high
October Weather	18°C (64°F)	291 mm (11.4 inches)	83%	high
November Weather	12°C (55°F)	69 mm (2.7 inches)	80%	moderate
December Weather	7°C (44°F)	55 mm (2.2 inches)	78%	moderate