Spring (March–May): Average 4.4–15.6°C, mild climate, but still chilly in early spring, gradually warming, moderate rainfall. Common activities: Spring outings, flower viewing. Recommended clothing: Spring jacket, comfortable trousers, warm inner layers.
Summer (June–August): Average 20.2–25.9°C, hot and rainy, high humidity. Common activities: Summer resort visits, stream activities. Recommended clothing: Breathable clothing, light shorts, rain gear.
Autumn (September–November): Average 13.6–21.7°C, comfortable and pleasant climate, reduced rainfall, crisp autumn weather. Common activities: Viewing red leaves, mountain hiking. Recommended clothing: Light jacket, long-sleeved shirts, comfortable trousers.
Winter (December–February): Average -1.0–4.4°C, cold and dry, occasional snowfall. Common activities: Skiing, hot spring experience. Recommended clothing: Warm jacket, thick sweater, scarf, gloves, hat.
Aoyama climatological average
Annual average temperature: approx. 12°C / Annual rainfall: approx. 1443 mm / Summer humidity: 70%–80% / Rainiest month: August
Aoyama monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
-1°C
41
February
-0.1°C
44
March
4.4°C
108.3
April
11.5°C
84.7
May
15.6°C
85.7
June
20.2°C
122.7
July
24.6°C
273
August
25.9°C
305.3
September
21.7°C
156.3
October
13.6°C
71.3
November
7.7°C
76.7
December
1°C
74.3
Aoyama weather for the next seven days
4/3
Friday
Patchy rain nearby
10.1°C/-2.6°C
4/4
Saturday
Moderate rain
12.1°C/0.5°C
4/5
Sunday
Patchy rain nearby
13.5°C/6°C
4/6
Monday
Patchy rain nearby
17.5°C/4.4°C
4/7
Tuesday
Moderate rain
15.3°C/6.4°C
4/8
Wednesday
Patchy rain nearby
9.6°C/1.1°C
4/9
Thursday
Sunny
15.1°C/0.2°C
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