Nagano weather in September

Thinking about venturing to Nagano this September and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What is the weather like in Nagano in September?

Nagano is a region in Japan. September in Nagano generally has warm temperatures, with heavy precipitation. During September, summer is in full swing.

The average maximum temperatures are warm and range from 22°C in Omachi to 25°C in Ueda. Nighttime temperatures generally drop to 15°C in Ueda and 13°C in Omachi.

In September, precipitation varies across different areas. From heavy rainfall in Tateshina with an average of 162 mm to heavy rainfall in Otari with 306 mm. The city Hakuba usually sees around 115 hours of sunlight, indicating a moderately sunny period.

For a closer look at September's conditions in Nagano, see the map below. For a more detailed look at Nagano's yearly weather, check out our Nagano climate page.

Where to go in Nagano in September

Find the average weather conditions in September for the most popular destinations in Nagano on the map below. Click on a destination dot for more detailed information.

Map not visible? Whoops sorry! Please refresh the page.
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).

Popular destinations in Nagano

What is the weather like in September for the 5 most popular destinations in Nagano?

Average weather in Hakuba

In September Hakuba generally has high temperatures with maximum daytime temperatures around 23°C, minimum nighttime temperatures around 15°C and heavy monthly rainfall. So on average the conditions are poor that month.

Hakuba
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
27°C 
19°C 
166 hours 
289 mm 
20 days 
poor 
23°C 
15°C 
115 hours 
306 mm 
20 days 
poor 
October   >> October
>>  
17°C 
8°C 
129 hours 
236 mm 
17 days 
poor 
Climate in Hakuba

Average weather in Yamanouchi

In September Yamanouchi generally has high temperatures with maximum daytime temperatures around 24°C, minimum nighttime temperatures around 15°C and heavy monthly rainfall. So on average the conditions are tolerable that month.

Yamanouchi
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
28°C 
19°C 
206 hours 
186 mm 
21 days 
24°C 
15°C 
142 hours 
192 mm 
21 days 
October   >> October
>>  
17°C 
8°C 
155 hours 
159 mm 
17 days 
Climate in Yamanouchi

Average weather in Matsumoto

In September Matsumoto generally has high temperatures with maximum daytime temperatures around 24°C, minimum nighttime temperatures around 14°C and heavy monthly rainfall. So on average the conditions are unpleasant that month.

Matsumoto
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
28°C 
18°C 
206 hours 
170 mm 
19 days 
24°C 
14°C 
142 hours 
220 mm 
19 days 
October   >> October
>>  
18°C 
8°C 
155 hours 
197 mm 
15 days 
Climate in Matsumoto

Average weather in Nozawa Onsen

In September Nozawa Onsen generally has high temperatures with maximum daytime temperatures around 25°C, minimum nighttime temperatures around 16°C and heavy monthly rainfall. So on average the conditions are unpleasant that month.

Nozawa Onsen
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
29°C 
20°C 
197 hours 
203 mm 
19 days 
25°C 
16°C 
128 hours 
212 mm 
20 days 
October   >> October
>>  
19°C 
9°C 
135 hours 
184 mm 
17 days 
Climate in Nozawa Onsen

Average weather in Karuizawa

In September Karuizawa generally has high temperatures with maximum daytime temperatures around 24°C, minimum nighttime temperatures around 15°C and heavy monthly rainfall. So on average the conditions are unpleasant that month.

Karuizawa
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
28°C 
19°C 
206 hours 
211 mm 
20 days 
24°C 
15°C 
142 hours 
224 mm 
20 days 
October   >> October
>>  
18°C 
9°C 
155 hours 
178 mm 
15 days 
Climate in Karuizawa

Is your destination not in the list? Have a look at other destinations in Nagano, in Japan.

Is September the best time to visit Nagano?

In our opinion, September may not be the ideal time to visit Nagano due to the typically poor weather in Hakuba.

Generally speaking, provide poor weather in Hakuba.

Interested in more climate information?

We have much more information about the climate in Nagano. Interested in the weather conditions in a specific month? Select the month below.

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  • Weather and climate has detailed information for every country in the world. Are you going to Japan? Get detailed 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.