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May Weather in Niimi, Japan

Last updated: August 23, 2025

In May, the average temperature in Niimi, Japan hovers around 17°C (63°F). Expect a range where the minimum dips to 2°C (36°F) and the maximum can reach 31°C (87°F). With an average humidity of 84%, prepare for a somewhat muggy atmosphere, complemented by 115 mm (4.5 in) of precipitation spread over approximately 10 days.

May Temperature in Niimi

In May in Niimi, the average temperature is 17°C (63°F). Maximums can reach 31°C (87°F), and minimums can dip as low as 2°C (36°F). This diverse weather makes Niimi an appealing destination for travelers seeking both warmth and the chance to experience cooler nights.

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

The chart illustrates May temperature patterns in Niimi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Niimi, May typically has an average temperature of 17°C (63°F), with highs reaching up to 31°C (87°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec363846546369767971615040
Data source: Temperature data for Niimi 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 Niimi

In Niimi in May, the precipitation amount is 115 mm (4.5 in) over a span of 10 days.

May Precipitation Trends in Niimi

The chart displays monthly precipitation patterns in Niimi, 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 Niimi, May typically receives around 115 mm (4.5 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec52591161271151863562422291813862
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Niimi

In Niimi in May, humidity is 84%. With an average temperature of 17°C (63°F), this humidity feels like a warm, sticky embrace that can make traveling feel heavy and cumbersome, often leaving visitors yearning for refreshing breezes and shade.

May Average Humidity in Niimi

This chart illustrates the average monthly humidity levels in Niimi, 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 Niimi is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%73%74%84%86%92%92%87%85%84%82%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Niimi

In Niimi 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 Niimi.

Maximum UV Index Levels in Niimi for May

The chart shows the monthly maximum UV Index (UVI) for Niimi 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 Niimi typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111121210753
Data source: Niimi 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 Niimi Compares to Other Months

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

This table compares monthly weather conditions in Niimi, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (37°F)52 mm (2.1 inches)82%moderate
February Weather3°C (38°F)59 mm (2.3 inches)79%high
March Weather8°C (46°F)116 mm (4.5 inches)73%very high
April Weather12°C (54°F)127 mm (5.0 inches)74%very high
May Weather17°C (63°F)115 mm (4.5 inches)84%extreme
June Weather21°C (69°F)186 mm (7.3 inches)86%extreme
July Weather25°C (77°F)356 mm (14.0 inches)92%extreme
August Weather26°C (79°F)242 mm (9.5 inches)92%extreme
September Weather22°C (71°F)229 mm (9.0 inches)87%very high
October Weather16°C (61°F)181 mm (7.1 inches)85%high
November Weather10°C (50°F)37 mm (1.5 inches)84%moderate
December Weather4°C (40°F)62 mm (2.4 inches)82%moderate

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