July Weather in Joetsu, Japan

Last updated: August 23, 2025

In July, the average temperature in Joetsu, Japan hovers around 26°C (79°F), offering a warm escape. On particularly hot days, temperatures can peak at a sizzling 38°C (101°F), while cool evenings may drop to a refreshing 19°C (67°F). Expect 290 mm (11.4 in) of precipitation spread over 17 days, contributing to an average humidity of 92%, creating a lush and vibrant atmosphere.

July Temperature in Joetsu

In July in Joetsu, the average temperature is 26°C (79°F). The maximum can reach 38°C (101°F) and the minimum can be as low as 19°C (67°F). It's an ideal time to visit for those who enjoy warm weather and outdoor activities.

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

The chart illustrates July 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, July typically has an average temperature of 26°C (79°F), with highs reaching up to 38°C (101°F) and lows dropping to around 19°C (67°F).

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

July Precipitation in Joetsu

In Joetsu in July, the precipitation amount is 290 mm (11.4 in) spread out over 17 days.

July Precipitation Trends in Joetsu

The chart displays monthly precipitation patterns in Joetsu, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Joetsu, July typically receives around 290 mm (11.4 inches) of precipitation spread over approximately 17 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Joetsu

In Joetsu in July humidity is 92%. With an average temperature of 26°C (79°F), this humidity feels like an oppressive blanket wrapping around you, making outdoor activities a challenge and leaving you longing for shade and cool beverages.

July Average Humidity in Joetsu

This chart illustrates the average monthly humidity levels in Joetsu, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Joetsu is approximately 92%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Joetsu

In Joetsu in July, 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 July

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

Data source: Joetsu July 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 July 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 July’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 July’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