May Weather in Omachi, Japan

Last updated: August 23, 2025

The average temperature in Omachi, Japan during May hovers around 11°C (52°F), with a minimum dipping to -6°C (21°F) and a maximum reaching 24°C (76°F). Expect a significant amount of rain, with 276 mm (10.9 in) of precipitation spread over 19 days. Additionally, the average humidity remains comfortably high at 81%, creating a unique climate experience.

May Temperature in Omachi

In May in Omachi, the average temperature is 11°C (52°F), with maximums reaching 24°C (76°F) and minimums dropping as low as -6°C (21°F). It's an ideal time for travelers to enjoy a mix of mild and chilly weather, so be sure to pack accordingly!

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

The chart illustrates May temperature patterns in Omachi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Omachi, May typically has an average temperature of 11°C (52°F), with highs reaching up to 24°C (76°F) and lows dropping to around -6°C (21°F).

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

May Precipitation in Omachi

In Omachi in May, the precipitation amount is 276 mm (10.9 in) over the course of 19 days.

May Precipitation Trends in Omachi

The chart displays monthly precipitation patterns in Omachi, 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 Omachi, May typically receives around 276 mm (10.9 inches) of precipitation spread over approximately 19 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 Omachi

In Omachi in May humidity is 81%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that can make outdoor excursions quite uncomfortable, causing a muggy heaviness that dampens clothes and leaves travelers longing for dryer weather.

May Average Humidity in Omachi

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

In Omachi 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 Omachi.

Maximum UV Index Levels in Omachi for May

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

Data source: Omachi 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 Omachi Compares to Other Months

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

This table compares monthly weather conditions in Omachi, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (19°F)	193 mm (7.6 inches)	88%	moderate
February Weather	-7°C (20°F)	181 mm (7.1 inches)	86%	high
March Weather	-1°C (30°F)	198 mm (7.8 inches)	81%	very high
April Weather	4°C (39°F)	226 mm (8.9 inches)	78%	very high
May Weather	11°C (52°F)	276 mm (10.9 inches)	81%	extreme
June Weather	15°C (59°F)	310 mm (12.2 inches)	88%	extreme
July Weather	19°C (67°F)	565 mm (22.3 inches)	92%	extreme
August Weather	20°C (69°F)	400 mm (15.8 inches)	92%	extreme
September Weather	16°C (61°F)	334 mm (13.1 inches)	89%	very high
October Weather	10°C (50°F)	284 mm (11.2 inches)	87%	high
November Weather	3°C (37°F)	139 mm (5.5 inches)	85%	moderate
December Weather	-5°C (24°F)	206 mm (8.1 inches)	86%	moderate