May Weather in Oiso, Japan

Last updated: August 23, 2025

In May, the average temperature in Oiso, Japan hovers around 18°C (64°F), making it a pleasant time of year. Expect minimums dipping to 10°C (51°F) and maximums reaching 25°C (76°F). However, don't forget your umbrella; with an average precipitation of 166 mm (6.5 in) over 12 days, it's wise to be prepared. With an average humidity level of 81%, the air can feel quite moist, adding to the season's unique charm.

May Temperature in Oiso

In May in Oiso, the average temperature is 18°C (64°F). The maximum can reach 25°C (76°F), while the minimum can be as low as 10°C (51°F). This mild climate makes it an ideal time for exploring outdoor activities and enjoying the local scenery.

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

The chart illustrates May temperature patterns in Oiso, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oiso, May typically has an average temperature of 18°C (64°F), with highs reaching up to 25°C (76°F) and lows dropping to around 10°C (51°F).

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

May Precipitation in Oiso

In Oiso in May, the precipitation amount is 166 mm (6.5 in) distributed over a span of 12 days.

May Precipitation Trends in Oiso

The chart displays monthly precipitation patterns in Oiso, 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 Oiso, May typically receives around 166 mm (6.5 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 Oiso

In Oiso in May, humidity is 81%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making travel both refreshing and slightly stifling at the same time.

May Average Humidity in Oiso

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

In Oiso 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 Oiso.

Maximum UV Index Levels in Oiso for May

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

Data source: Oiso 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 Oiso Compares to Other Months

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

This table compares monthly weather conditions in Oiso, 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 (44°F)	69 mm (2.7 inches)	76%	moderate
February Weather	7°C (45°F)	75 mm (3.0 inches)	74%	moderate
March Weather	10°C (51°F)	195 mm (7.7 inches)	70%	very high
April Weather	13°C (57°F)	162 mm (6.4 inches)	74%	very high
May Weather	18°C (64°F)	166 mm (6.5 inches)	81%	extreme
June Weather	21°C (70°F)	224 mm (8.8 inches)	88%	extreme
July Weather	24°C (76°F)	263 mm (10.3 inches)	93%	extreme
August Weather	26°C (80°F)	159 mm (6.2 inches)	90%	extreme
September Weather	23°C (74°F)	235 mm (9.3 inches)	86%	very high
October Weather	19°C (66°F)	346 mm (13.6 inches)	83%	high
November Weather	14°C (58°F)	115 mm (4.5 inches)	80%	moderate
December Weather	9°C (49°F)	91 mm (3.6 inches)	78%	moderate