Joetsu Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from very warm to chilly in Joetsu. Average daytime temperatures reach a very warm 30°C (86°F) in August. In February, the coolest month of the year, temperatures drop to a chilly 6°C (43°F).

At night, temperatures range from around 23°C (73°F) in August to -1°C (30°F) in February.

Check out our detailed temperature page for more information.

Temperature ranges by month

Joetsu has a relatively rain/snowy climate with high precipitation levels, averaging 2168 mm (85 in) of rain/snowfall annually. Joetsu can be quite wet during January, receiving approximately 257 mm (10 in) of precipitation over 28 snowy/rainy days.

In contrast, during the driest month (May), you will experience much drier conditions, with 112 mm (4.4 in) of precipitation spread across 17 rainy days days. For more details, please visit our Joetsu Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Joetsu can be enjoyed more throughout the sunniest month of May under a blue sky, with approximately 6.6 hours of sunshine daily. In contrast, the city experiences much darker days in January, with only 2.2 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in Joetsu.

The city experiences its highest humidity in July, reaching 80%. In April, the humidity drops to its lowest level at 67%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year