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May Weather in Nankoku, Japan

Last updated: August 23, 2025

In May, the average temperature in Nankoku, Japan is a pleasant 19°C (67°F). However, temperatures can vary, with a minimum of 9°C (49°F) and a maximum of 26°C (80°F). Expect some rain, as 206 mm (8.1 in) of precipitation falls over about 10 days, accompanied by a humidity level averaging 82%. Prepare accordingly for a mix of mild weather and occasional showers!

May Temperature in Nankoku

In May in Nankoku, the average temperature is 19°C (67°F). Maximums can reach 26°C (80°F), and minimums can be as low as 9°C (49°F). This mild climate makes it an ideal time for travelers to explore the area's attractions comfortably.

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

The chart illustrates May temperature patterns in Nankoku, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Nankoku, May typically has an average temperature of 19°C (67°F), with highs reaching up to 26°C (80°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec464753606772798177695950
Data source: Temperature data for Nankoku 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 Nankoku

In Nankoku in May, the precipitation amount is 206 mm (8.1 in) over the course of 10 days.

May Precipitation Trends in Nankoku

The chart displays monthly precipitation patterns in Nankoku, 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 Nankoku, May typically receives around 206 mm (8.1 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec54861471702062865232982622516367
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Nankoku

In Nankoku in May humidity is 82%. With an average temperature of 19°C (67°F), this humidity feels like a heavy blanket wrapping around you, making each step feel sluggish and the air thick as you explore the sights.

May Average Humidity in Nankoku

This chart illustrates the average monthly humidity levels in Nankoku, 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 Nankoku is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%70%70%76%83%86%91%88%85%82%79%77%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Nankoku

In Nankoku 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 Nankoku.

Maximum UV Index Levels in Nankoku for May

The chart shows the monthly maximum UV Index (UVI) for Nankoku 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 Nankoku typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469111112121210764
Data source: Nankoku 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 Nankoku Compares to Other Months

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

This table compares monthly weather conditions in Nankoku, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)54 mm (2.1 inches)74%moderate
February Weather8°C (47°F)86 mm (3.4 inches)70%high
March Weather12°C (54°F)147 mm (5.8 inches)70%very high
April Weather15°C (60°F)170 mm (6.7 inches)76%extreme
May Weather19°C (67°F)206 mm (8.1 inches)82%extreme
June Weather22°C (73°F)286 mm (11.3 inches)86%extreme
July Weather26°C (79°F)523 mm (20.6 inches)91%extreme
August Weather27°C (82°F)298 mm (11.7 inches)88%extreme
September Weather25°C (77°F)262 mm (10.3 inches)85%very high
October Weather20°C (69°F)251 mm (9.9 inches)82%high
November Weather15°C (59°F)63 mm (2.5 inches)79%high
December Weather10°C (50°F)67 mm (2.7 inches)77%moderate

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