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.
Weather in Joetsu
Annual average temperature: approx. 7.2°C / Annual rainfall: approx. 1426 mm / Summer humidity: 70%–80% / Rainiest month: August
Joetsu weather by month
Month
Temperature (°C)
Rainfall (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
7-day weather forecast for Joetsu
10/31
Saturday
Patchy rain nearby
13.2°C/2.2°C
11/1
Sunday
Light snow showers
3.8°C/-0.5°C
11/2
Monday
Patchy rain nearby
5.5°C/-0.7°C
11/3
Tuesday
Patchy rain nearby
4.9°C/-0.6°C
11/4
Wednesday
Moderate or heavy snow showers
3.4°C/-1.1°C
11/5
Thursday
Overcast
7.8°C/-2.7°C
11/6
Friday
Light rain shower
10.9°C/2°C
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