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Nagano

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Nagano Weather, Climate and Best Time to Visit

Data source:Meteostat
Update date:2025-09

Nagano year round climate

  • Spring (March–May): Average 6–17°C, mild climate but with a large temperature difference between day and night, increasing rainfall. Common activities: Cherry blossom viewing, hiking, mountain trekking. Recommended clothing: Light jacket, long-sleeved shirt, comfortable shoes.
  • Summer (June–August): Average 21–27°C, high temperature, high humidity, and frequent rain. Common activities: Summer resorts, water activities, enjoying mountain scenery. Recommended clothing: Light and breathable clothing, sun hat, sunscreen.
  • Autumn (September–November): Average 9–24°C, comfortable and pleasant climate, crisp autumn air, gradual change in foliage color. Common activities: Maple leaf viewing, hiking, hot spring bathing. Recommended clothing: Light jacket, long-sleeved shirt, comfortable shoes.
  • Winter (December–February): Average -0.3–2.6°C, cold and dry, high probability of snowfall. Common activities: Skiing, winter sports, enjoying snow scenes. Recommended clothing: Warm jacket, beanie, scarf, gloves, waterproof and warm shoes.

Nagano climatological average

Annual average temperature: approx. 13°C / Annual rainfall: approx. 1004 mm / Summer humidity: 70%–80% / Rainiest month: July

Nagano monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
-0.3°C
37.7
February
0.9°C
43.3
March
6°C
76.7
April
12.9°C
83.7
May
16.6°C
108.3
June
21.3°C
94.7
July
25.7°C
141.3
August
27°C
115
September
23.9°C
138.7
October
15.1°C
64
November
9.2°C
70.7
December
2.6°C
30.7

Nagano weather for the next seven days

12/7
Sunday
Sunny
8°C/-6.8°C
12/8
Monday
Patchy rain nearby
9.6°C/-2.7°C
12/9
Tuesday
Patchy rain nearby
5.4°C/-3.6°C
12/10
Wednesday
Sunny
7.3°C/-5.5°C
12/11
Thursday
Patchy rain nearby
8.2°C/-3°C
12/12
Friday
Moderate or heavy snow showers
2.1°C/-5°C
12/13
Saturday
Moderate snow
5.4°C/-7.1°C