October Weather in Joetsu, Japan

Last updated: August 23, 2025

In October, the average temperature in Joetsu, Japan hovers around 18°C (64°F), with nightly lows dipping to 9°C (48°F) and daytime highs reaching up to 32°C (89°F). Expect 190 mm (7.5 in) of precipitation over approximately 16 days, contributing to an average humidity of 87%. Enjoy the embrace of this mild yet humid climate!

October Temperature in Joetsu

In October in Joetsu, the average temperature is 18°C (64°F). The maximum can reach 32°C (89°F), while the minimum can be as low as 9°C (48°F). This makes Joetsu a great destination for travelers looking to enjoy mild weather and a variety of outdoor activities.

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

The chart illustrates October 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, October typically has an average temperature of 18°C (64°F), with highs reaching up to 32°C (89°F) and lows dropping to around 9°C (48°F).

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

October Precipitation in Joetsu

In Joetsu in October, the precipitation amount is 190 mm (7.5 in) over a span of 16 days.

October Precipitation Trends in Joetsu

The chart displays monthly precipitation patterns in Joetsu, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Joetsu, October typically receives around 190 mm (7.5 inches) of precipitation spread over approximately 16 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Joetsu

In Joetsu in October humidity is 87%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making travel slightly uncomfortable as the air clings to your skin and saps your energy, urging you to seek shade and refreshing drinks more frequently.

October Average Humidity in Joetsu

This chart illustrates the average monthly humidity levels in Joetsu, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Joetsu is approximately 87%, offering insight into how humid the weather typically is during this month.

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

October UV Index in Joetsu

In Joetsu in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Joetsu, you can refer to this Hourly UV Index in Joetsu.

Maximum UV Index Levels in Joetsu for October

The chart shows the monthly maximum UV Index (UVI) for Joetsu in October, 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 October, the maximum UV index in Joetsu typically reaches 6, which falls under the high exposure category.

Data source: Joetsu October 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 October 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 October’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 October’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