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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 42–62°F, 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 69–80°F, 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 48–75°F, 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 -32–36°F, 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. 55.4°F / Annual rainfall: approx. 1004 mm / Summer humidity: 70%–80% / Rainiest month: July

Nagano monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
31.5°F
37.7
February
33.6°F
43.3
March
42.8°F
76.7
April
55.2°F
83.7
May
61.9°F
108.3
June
70.3°F
94.7
July
78.3°F
141.3
August
80.6°F
115
September
75°F
138.7
October
59.2°F
64
November
48.6°F
70.7
December
36.7°F
30.7

Nagano weather for the next seven days

12/17
Wednesday
Moderate rain
47.4°F/26.9°F
12/18
Thursday
Patchy rain nearby
38.1°F/21.8°F
12/19
Friday
Sunny
48.6°F/22°F
12/20
Saturday
Patchy rain nearby
51.7°F/28.3°F
12/21
Sunday
Patchy rain nearby
61.4°F/37.5°F
12/22
Monday
Moderate rain
41°F/36.7°F
12/23
Tuesday
Sunny
41.5°F/25.8°F