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May Weather in Tonami, Japan

Last updated: August 23, 2025

In May, the average temperature in Tonami, Japan is a pleasant 16°C (62°F), but be prepared for a range—minimums can dip to 3°C (37°F) while maximums soar to 31°C (87°F). With 170 mm (6.7 in) of precipitation spread over 15 days, an umbrella might be a handy companion. Expect a high average humidity of 85%, making the air feel quite balmy!

May Temperature in Tonami

In May in Tonami, the average temperature is 16°C (62°F). Maximums can reach 31°C (87°F), and minimums can be as low as 3°C (37°F). This diverse temperature range makes it essential for travelers to pack versatile clothing suitable for both warm days and cooler evenings.

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

The chart illustrates May temperature patterns in Tonami, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tonami, May typically has an average temperature of 16°C (62°F), with highs reaching up to 31°C (87°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec313341506167757869584737
Data source: Temperature data for Tonami 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 Tonami

In Tonami in May, the total precipitation amount is 170 mm (6.7 in) over the course of 15 days.

May Precipitation Trends in Tonami

The chart displays monthly precipitation patterns in Tonami, 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 Tonami, May typically receives around 170 mm (6.7 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec205193209214170248424321285261162250
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Tonami

In Tonami in May humidity is 85%. With an average temperature of 16°C (62°F), this humidity feels like a warm, heavy blanket wrapping around you, making travel feel sluggish and sticky, and urging you to seek shade and hydration at every stop.

May Average Humidity in Tonami

This chart illustrates the average monthly humidity levels in Tonami, 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 Tonami is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%78%76%77%85%89%93%92%84%81%77%79%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Tonami

In Tonami 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 Tonami.

Maximum UV Index Levels in Tonami for May

The chart shows the monthly maximum UV Index (UVI) for Tonami 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 Tonami typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111111110753
Data source: Tonami 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 Tonami Compares to Other Months

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

This table compares monthly weather conditions in Tonami, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)204 mm (8.1 inches)80%moderate
February Weather0°C (33°F)193 mm (7.6 inches)78%high
March Weather5°C (41°F)209 mm (8.2 inches)76%very high
April Weather10°C (51°F)214 mm (8.4 inches)77%very high
May Weather16°C (62°F)170 mm (6.7 inches)85%extreme
June Weather20°C (67°F)248 mm (9.8 inches)89%extreme
July Weather24°C (76°F)424 mm (16.7 inches)93%extreme
August Weather25°C (78°F)321 mm (12.6 inches)92%extreme
September Weather21°C (70°F)285 mm (11.2 inches)84%very high
October Weather15°C (59°F)261 mm (10.3 inches)81%high
November Weather8°C (47°F)162 mm (6.4 inches)77%moderate
December Weather3°C (37°F)250 mm (9.8 inches)79%moderate

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