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May Weather in Ishioka, Japan

Last updated: August 23, 2025

In May, the average temperature in Ishioka, Japan is a comfortable 19°C (66°F). Expect a range from a cool 7°C (45°F) at night to a warm 32°C (91°F) during the day. With 131 mm (5.1 in) of precipitation spread over approximately 12 days, it’s wise to keep an umbrella handy. The air is quite humid, with an average humidity of 80%, enhancing the tropical feel of the season.

May Temperature in Ishioka

In May in Ishioka, the average temperature is 19°C (66°F). The maximum can reach 32°C (91°F), while the minimum can drop as low as 7°C (45°F). This makes Ishioka a great destination for those looking to enjoy mild weather with warm days and cooler nights.

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

The chart illustrates May temperature patterns in Ishioka, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ishioka, May typically has an average temperature of 19°C (66°F), with highs reaching up to 32°C (91°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec394249566671788174645544
Data source: Temperature data for Ishioka generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Ishioka

In Ishioka in May, the precipitation amount is 131 mm (5.1 in) spread over 12 days.

May Precipitation Trends in Ishioka

The chart displays monthly precipitation patterns in Ishioka, 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 Ishioka, May typically receives around 131 mm (5.1 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec44411341181311402201171722397858
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Ishioka

In Ishioka in May humidity is 80%. With an average temperature of 19°C (66°F), this humidity feels like a warm, thick blanket wrapping around you, making outdoor activities feel more strenuous and sticky, which can ultimately dampen the experience of traveling.

May Average Humidity in Ishioka

This chart illustrates the average monthly humidity levels in Ishioka, 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 Ishioka is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%75%72%73%80%87%93%90%84%80%77%77%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Ishioka

In Ishioka in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Ishioka.

Maximum UV Index Levels in Ishioka for May

The chart shows the monthly maximum UV Index (UVI) for Ishioka 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 Ishioka typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109653
Data source: Ishioka 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 Ishioka Compares to Other Months

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

This table compares monthly weather conditions in Ishioka, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)44 mm (1.7 inches)76%moderate
February Weather5°C (42°F)41 mm (1.6 inches)75%moderate
March Weather10°C (49°F)134 mm (5.3 inches)72%high
April Weather14°C (57°F)118 mm (4.6 inches)73%very high
May Weather19°C (66°F)131 mm (5.1 inches)80%very high
June Weather22°C (71°F)140 mm (5.5 inches)87%extreme
July Weather25°C (78°F)220 mm (8.7 inches)92%extreme
August Weather27°C (81°F)117 mm (4.6 inches)90%very high
September Weather23°C (74°F)172 mm (6.8 inches)84%very high
October Weather18°C (65°F)239 mm (9.4 inches)80%high
November Weather13°C (55°F)78 mm (3.1 inches)77%moderate
December Weather7°C (44°F)58 mm (2.3 inches)77%moderate

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