Nagano Climate by Month
The temperature in Nagano can vary quite a bit throughout the year.
Temperatures can be warm during the warmest months,
and cold during the cooler months.
It also has a notably wet climate with much precipitation.
Now, let’s explore all the climate details to give you a full picture.
Average day and night temperature
Visitors to Nagano can expect significant temperature changes throughout the year. Average daytime temperatures range from a comfortable 29°C in August, the warmest time of the year, to a chilly 3°C during cooler months like January. At night, temperatures typically average around -6°C during these months.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Nagano is known for its substantial rain/snowfall, with annual precipitation reaching 2106 mm. While rainfall varies throughout the year, each season offers its own charm. July brings wetter days averaging 273 mm of precipitation, spread over 21 rainy days. In contrast, November experiences a drier climate, with about 129 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
While the amount of sunshine in Nagano varies throughout the year, all seasons offer their own charm. Enjoy up to 7.0 hours of daily sun in May, and experience slightly darker atmosphere in January, with about 4.3 hours of daily sunlight.Monthly hours of sunshine
Daily hours of sunshine
Average humidity
The relative humidity is moderate throughout the year in Nagano.
Relative humidity over the year
The best time of year to visit Nagano in Japan
During the months of May, June and September 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:
August has an average maximum temperature of 29°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 3°C.
July tops the wettest month list with 273 mm of rainfall.
November is the driest month with 129 mm of precipitation.
May is the sunniest month with an average of 209 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.
