The temperatures in Nagano in October are quite cold with temperatures between 8°C and 19°C, warm clothes are a must.
You can expect rain for roughly half of the month of October in Nagano. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Nagano in October 2025.
If you’re planning to visit Nagano in the near future, we highly recommend that you review the 14 day weather forecast for Nagano before you arrive.
Temperatures
19° / 8°
Rainy Days
11
Snowy Days
0
Dry Days
21
Rainfall
73
mm
Sun Hours
2.0
Hrs
