Joetsu Weather & Climate: Best Time to Visit
Joetsu, Niigata Prefecture, Japan, experiences significant temperature variation throughout the year. Summers bring daytime highs of 30°C (86°F) in August, while winters cool to 6°C (43°F) in February.
With around 2168 mm (85 in) of annual rain/snowfall, Joetsu has a notably wet climate. However, this rain/snowfall is not evenly distributed — the city has a distinct rainy season from September to February. The wettest month is January. The sunniest month is May, with 6.6 hours of sunshine per day on average.
Monthly Temperature in Joetsu
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
Rainfall in Joetsu
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
Sunshine Hours in Joetsu
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
Humidity in Joetsu by Month
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
Joetsu 3-Day Forecast
Check the conditions for any month of the year.
Best Time to Visit Joetsu
During the months of May, June and August, Joetsu enjoys pleasant weather with average temperatures ranging from 21°C (71°F) to 30°C (87°F). These months are perfect for sightseeing and exploring.Rainfall during this time ranges from 112 mm (4.4 in) in May to 159 mm (6.3 in) in August. This means you can expect a mix of sunny days and occasional showers.
The rainy season falls during January, February, July, September, October, November and December, bringing heavy precipitation. Wondering where to travel based on your weather preferences? Our recommendation tool helps you find destinations with your ideal climate conditions. Use our weather planner to find your perfect destination.
