Nagano weather in September (Nagano, Japan)

Planning a trip to Nagano in September? This guide provides all the details you need.

In September, Nagano typically experiences high temperatures and heavy rainfall. September falls within the summer season. Throughout the day, temperatures typically settle at around 24°C. But by evening, they drop to around 15°C.

Nagano in September falls under the rainy season with heavy rainfall, averaging around 219 mm for the month. When we look at the climate data from the last 30 years, we can expect around 20 days of rain.

The area experiences a moderate amount of sunshine, with approximately 142 hours of sunlight expected. This makes it neither too gloomy nor overly bright.

If you prefer dry days with pleasant temperatures, May typically offers the best circumstances. While January, February, March, July, November and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Nagano climate page with graphs.

 

Nagano, monthly averages in September

Min Temperature 15°C  

Max Temperature 24°C  

Chance of Rain 65%  

Precipitation 219 mm  

Rainy days 20 days  

Humidity 74%  

Sunshine 142 hours  

Percentage Sunshine  

Where to go in Japan in September

Find out more about the weather in Japan in September and which places have the best weather conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Nagano in September?

For visitors traveling to Nagano, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in September.

Swimming

7/10

Camping

6/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Nagano.

Our site offers climate and forecast data for every country in the world. Are you going to Japan? On this website you can find historical weather averages for many cities in Japan. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.