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Joetsu

Travel guide

Best time to visit Joetsu

Data source:Meteostat
Last updated:2025-09

Weather in Joetsu throughout the year

  • 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

11/5
Thursday
Overcast
12.6°C/-0.2°C
11/6
Friday
Light drizzle
10.2°C/0.8°C
11/7
Saturday
Heavy snow
0.4°C/-2.3°C
11/8
Sunday
Heavy snow
0.5°C/-4.6°C
11/9
Monday
Moderate or heavy snow showers
-0.3°C/-7°C
11/10
Tuesday
Partly Cloudy
-0.5°C/-7.7°C
11/11
Wednesday
Patchy rain nearby
2.9°C/-3.6°C