Spring (March–May): Average -1.2–12.2°C, the climate transitions from cold to mild, with chances of snowfall in March; it gradually warms up starting in April. Common activities: viewing spring scenery, spring outings. Recommended clothing: warm coat, sweater, scarf, hat.
Summer (June–August): Average 16.8–22.1°C, warm and humid climate with more rainfall, particularly in August. Common activities: mountain hiking (be mindful of weather changes), riverside recreation. Recommended clothing: light and breathable clothing, rain gear.
Autumn (September–November): Average 9.6–16.9°C, comfortable and cool climate with gradually decreasing rainfall. Common activities: viewing autumn leaves, mountain climbing. Recommended clothing: light jacket, long-sleeved shirt.
Winter (December–February): Average -8.4–-1.2°C, cold and dry climate with significant snowfall. Common activities: skiing, snow activities. Recommended clothing: warm clothing, thick coat, waterproof snow boots.
Joetsu climatological average
Annual average temperature: approx. 7.2°C / Annual rainfall: approx. 1426 mm / Summer humidity: 70%–80% / Rainiest month: August
Joetsu monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
-8.4°C
58.4
February
-7.1°C
48.7
March
-1.2°C
65.6
April
7°C
70.7
May
12.2°C
88.9
June
16.8°C
175.4
July
21.4°C
144.5
August
22.1°C
250.6
September
16.9°C
179.5
October
9.6°C
144.3
November
3.1°C
117.6
December
-5.7°C
82.3
Joetsu weather for the next seven days
10/16
Thursday
Patchy rain nearby
12.5°C/4.3°C
10/17
Friday
Patchy rain nearby
13.3°C/6.9°C
10/18
Saturday
Moderate rain
12.5°C/7.7°C
10/19
Sunday
Moderate rain
7.2°C/2.5°C
10/20
Monday
Moderate rain
4.7°C/0.8°C
10/21
Tuesday
Patchy rain nearby
5.4°C/0.5°C
10/22
Wednesday
Patchy rain nearby
5.1°C/1.8°C
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