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
11/5
Wednesday
Sunny
49.5°F/32.3°F
11/6
Thursday
Patchy rain nearby
50°F/37.5°F
11/7
Friday
Sunny
55.2°F/37.9°F
11/8
Saturday
Sunny
50.3°F/30.6°F
11/9
Sunday
Moderate rain
57.5°F/37.3°F
11/10
Monday
Patchy rain nearby
54.8°F/38.2°F
11/11
Tuesday
Sunny
48.9°F/31.4°F
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