Joetsu Climate by Month
The temperature in Joetsu can vary greatly throughout the year.
The temperatures shift from very warm
to cold.
It also experiences much rain/snowfall throughout the year.
Now, let’s break down all the climate details for a clearer picture.
Average day and night temperature
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 in August. In February, the coolest month of the year, temperatures drop to a chilly 6°C. At night, expect cooler temperatures, averaging -1°C during this month.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Joetsu has a relatively rain/snowy climate with high precipitation levels, averaging 2168 mm of rain/snowfall annually. Joetsu can be quite wet during January, receiving approximately 257 mm of precipitation over 28 snowy/rainy days. In contrast May, experiences much drier conditions, with 112 mm of rainfall, spread across 17 rainy days.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
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.Monthly hours of sunshine
Daily hours of sunshine
Average humidity
The relative humidity is moderate throughout the year in Joetsu.
Relative humidity over the year
The best time of year to visit Joetsu in Japan
During the months of May, June and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
The hottest season / summer takes place in June, July, August and September.
August has an average maximum temperature of 30°C and is the warmest month of the year.
The coldest month is February with an average maximum temperature of 6°C.
January tops the wettest month list with 257 mm of rainfall.
May is the driest month with 112 mm of precipitation.
May is the sunniest month with an average of 198 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
