June Weather in Joetsu, Japan

Last updated: August 23, 2025

In Joetsu, Japan, the average temperature in June is a comfortable 21°C (70°F). Expect variations with a minimum of 12°C (53°F) and a maximum of 32°C (89°F). During this month, anticipate 105 mm (4.1 in) of precipitation spread over 11 days, contributing to an average humidity level of 88%. Perfect for those who love a warm, lush atmosphere!

June Temperature in Joetsu

In June in Joetsu, the average temperature is 21°C (70°F). Maximums can reach 32°C (89°F), while minimums can dip as low as 12°C (53°F). This makes Joetsu an ideal destination for travelers looking to enjoy mild and pleasant weather.

June Weather in Joetsu: Daily Temperature Highs, Lows, and Averages

The chart illustrates June temperature patterns in Joetsu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Joetsu, June typically has an average temperature of 21°C (70°F), with highs reaching up to 32°C (89°F) and lows dropping to around 12°C (53°F).

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

June Precipitation in Joetsu

In Joetsu in June, the precipitation amount is 105 mm (4.1 in) over the course of 11 days.

June Precipitation Trends in Joetsu

The chart displays monthly precipitation patterns in Joetsu, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Joetsu, June typically receives around 105 mm (4.1 inches) of precipitation spread over approximately 11 days.

Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

June Humidity in Joetsu

In Joetsu in June, humidity is 88%. With an average temperature of 21°C (70°F), this humidity feels like a thick blanket enveloping you, making every step feel heavier and slightly stifling, which can be quite challenging for travelers.

June Average Humidity in Joetsu

This chart illustrates the average monthly humidity levels in Joetsu, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Joetsu is approximately 88%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Joetsu

In Joetsu in June, 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 Joetsu.

Maximum UV Index Levels in Joetsu for June

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

Data source: Joetsu June 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 June Weather in Joetsu Compares to Other Months

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

This table compares monthly weather conditions in Joetsu, showing how June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (38°F)	233 mm (9.2 inches)	88%	moderate
February Weather	4°C (39°F)	181 mm (7.1 inches)	86%	moderate
March Weather	8°C (46°F)	128 mm (5.0 inches)	81%	very high
April Weather	12°C (53°F)	121 mm (4.7 inches)	78%	very high
May Weather	17°C (64°F)	105 mm (4.1 inches)	81%	very high
June Weather	21°C (70°F)	105 mm (4.1 inches)	88%	extreme
July Weather	26°C (79°F)	290 mm (11.4 inches)	92%	extreme
August Weather	27°C (82°F)	157 mm (6.2 inches)	92%	extreme
September Weather	23°C (74°F)	171 mm (6.7 inches)	89%	very high
October Weather	18°C (64°F)	190 mm (7.5 inches)	87%	high
November Weather	12°C (53°F)	170 mm (6.7 inches)	85%	moderate
December Weather	6°C (43°F)	273 mm (10.7 inches)	86%	moderate