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Karuizawa

Karuizawa 1
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Travel Info

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Karuizawa Weather, Climate and Best Time to Visit

Data source:Meteostat
Update date:2025-09

Karuizawa year round climate

  • Spring (March–May): Average 2.9–12.4°C, mild and comfortable climate, but with a large temperature difference between morning and evening, occasional showers. Cherry blossoms bloom in some areas in March and April. Common activities: Cherry blossom viewing, hiking, cycling. Recommended clothing: Light jacket, long-sleeved shirt, comfortable shoes.
  • Summer (June–August): Average 17.0–21.8°C, cool and comfortable climate, a summer resort, but with more rainfall in June and July. Common activities: Outdoor activities, camping, visiting Karuizawa attractions. Recommended clothing: Light and breathable clothing, rain gear.
  • Autumn (September–November): Average 11.1–19.4°C, pleasant climate, colorful autumn leaves are a major feature of autumn, rainfall gradually decreases. Common activities: Maple leaf viewing, hiking, hot springs. Recommended clothing: Light jacket, long-sleeved shirt, comfortable shoes.
  • Winter (December–February): Average -2.8–-0.2°C, cold climate, less snowfall. Common activities: Skiing (requires going to nearby areas), enjoying the quiet snow scenery. Recommended clothing: Warm coat, hat, scarf, gloves.

Karuizawa climatological average

Annual average temperature: approx. 9.3°C / Annual rainfall: approx. 1270 mm / Summer humidity: 70%–80% / Rainiest month: June

Karuizawa monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
-2.8°C
10.7
February
-2°C
47.2
March
2.9°C
91
April
9.2°C
116.5
May
12.4°C
158.8
June
17°C
197.6
July
21.7°C
174.5
August
21.8°C
131.8
September
19.4°C
154.3
October
11.1°C
103.2
November
5.9°C
70.6
December
-0.2°C
14

Karuizawa weather for the next seven days

2/11
Wednesday
Heavy snow
1.6°C/-3.2°C
2/12
Thursday
Light freezing rain
1.2°C/-6.5°C
2/13
Friday
Sunny
5.2°C/-6.9°C
2/14
Saturday
Partly Cloudy
7.2°C/-3.7°C
2/15
Sunday
Sunny
10.5°C/-2.4°C
2/16
Monday
Partly Cloudy
4.2°C/-4°C
2/17
Tuesday
Sunny
4.8°C/-5.5°C