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Karuizawa

Karuizawa 1
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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 37–54°F, 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 62–71°F, 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 51–66°F, 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–-32.4°F, 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. 48.7°F / Annual rainfall: approx. 1270 mm / Summer humidity: 70%–80% / Rainiest month: June

Karuizawa monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
27°F
10.7
February
28.4°F
47.2
March
37.2°F
91
April
48.6°F
116.5
May
54.3°F
158.8
June
62.6°F
197.6
July
71.1°F
174.5
August
71.2°F
131.8
September
66.9°F
154.3
October
52°F
103.2
November
42.6°F
70.6
December
31.6°F
14

Karuizawa weather for the next seven days

12/21
Sunday
Patchy rain nearby
49°F/36.5°F
12/22
Monday
Light freezing rain
32°F/24.4°F
12/23
Tuesday
Sunny
34.2°F/24°F
12/24
Wednesday
Moderate or heavy snow showers
35.9°F/26.9°F
12/25
Thursday
Partly Cloudy
33.2°F/26°F
12/26
Friday
Sunny
32.2°F/19.3°F
12/27
Saturday
Moderate or heavy snow showers
36.3°F/28.4°F