Nagano Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Nagano.
Climate overview of Nagano
Nagano, Nagano Prefecture, Japan, sees big temperature differences between seasons, with August peaking at 29°C (84°F) and January dropping to 3°C (37°F).
Rain/snowfall is high, totalling around 2106 mm (83 in) per year. July is the wettest month and November the driest. The city also experiences a distinct rainy season from June to October. May is the sunniest month, averaging 7.0 hours of sunshine per day.
Nagano Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Nagano — and find the best time to visit.
Monthly Temperature in Nagano
Visitors to Nagano can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a comfortable 29°C (84°F) in August, the warmest time of the year, to a chilly 3°C (37°F) during cooler months like January.
At night, you can expect temperatures ranging from 19°C (66°F) in August to around -6°C (21°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Nagano
Nagano is known for its substantial rain/snowfall, with annual precipitation reaching 2106 mm (83 in). While rainfall varies throughout the year, each season offers its own charm. July brings wetter days averaging 273 mm (11 in) of precipitation, spread over 21 rainy days.
In contrast, the driest month November experiences a drier climate, with about 129 mm (5.1 in) of rainfall spread across 17 rainy days. For more details, please visit our Nagano 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 Nagano
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.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Nagano by Month
The relative humidity is high throughout the year in Nagano.
The city experiences its highest humidity in January, reaching 78%. In April, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Nagano
The weather brings rainfall of 154 mm (6.1 in) during this period.
Plan accordingly for June, July, August, September and October, when conditions bring the heaviest precipitation. Need help choosing your next travel destination? We offer a specialized tool that matches you with locations based on your weather preferences. Explore destinations that suit your climate preferences.
Frequently asked questions about the climate in Nagano
What is the best time to visit Nagano?
May typically offers the most optimal weather in Nagano. In contrast, January, February, March, July, November and December tend to have less optimal conditions. Nagano has a distinct rainy season from June to October.
What temperatures can I expect in Nagano?
Daytime highs range from 3°C (37°F) in January to 29°C (84°F) in August. Nighttime lows range from -6°C (21°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Nagano get?
Annual rainfall is around 2106 mm (83 in). July is the wettest month with 273 mm (11 in), while November is the driest with 129 mm (5.1 in).
How sunny is Nagano?
Nagano receives around 1,951 hours of sunshine per year. May is the sunniest month with 209 hours, while January is the cloudiest with just 128 hours.
Nagano 3-Day Forecast
Nagano 3-Day Forecast
Nagano on the map
Nagano is highlighted — select any city to see its climate.
Popular this month
Where to go in June — average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Chase the autumn leaves in Japan
Japan is one of these cases which turns into a gold, yellow and orange fairy tale starting from September. And we can honestly say: We cannot imagine a more beautiful season to visit Japan.
Walk the 88 temple circuit
We recommend walking the 88 temple circuit from April til October. Although June, July and August can be a bit wet, hot and humid.
The famous bamboo forests of Arashiyama
The famous bamboo forests of Arashiyama lie just outside the city center of Kyoto and is unique in the world. If you look at photos of this bamboo forest, it looks like you have landed in a fairy-tale world.
10 reasons why you should visit Japan in winter
Here are 10 reasons why you should plan a winter trip to Japan. During this period, popular sights are less busy and prices for flights and hotels much cheaper.