Best Time to Visit Joetsu
Best time: May, Apr, Jun, Aug.
Aug is warmest (30.6°C high); Dec is rainiest (383 mm).
Joetsu weather by month
| Month | High °C | Low °C | Rain mm | Sun hrs |
|---|---|---|---|---|
| Jan | 6.1 | -1.2 | 376 | 2.9 |
| Feb | 6.1 | -1.3 | 236 | 4.1 |
| Mar | 9.5 | 0.6 | 163 | 5.6 |
| Apr | 16.5 | 5.8 | 95 | 7.4 |
| May | 21.4 | 10.9 | 99 | 8.3 |
| Jun | 24.7 | 16.1 | 147 | 7.5 |
| Jul | 28.6 | 20.6 | 203 | 7.6 |
| Aug | 30.6 | 21.7 | 165 | 8 |
| Sep | 26.1 | 17.6 | 218 | 5.8 |
| Oct | 20.4 | 11.1 | 198 | 4.7 |
| Nov | 14.8 | 5.4 | 285 | 3.3 |
| Dec | 9.3 | 0.9 | 383 | 2.7 |
Average high temperature
Best months by activity
Overall: MayAprJunAug
Beaches: AugJul
Hiking: AprMay
Sightseeing: MayAprJun
Joetsu quick facts
What to pack
Cold months (Jan, Feb, Mar, Dec): warm layers and a coat.
Wet months (Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec): raincoat and umbrella.
Frequently asked questions
When is the best time to visit Joetsu?
May, Apr, Jun, Aug.
What is the rainiest month?
Dec, about 383 mm.
What is the warmest month?
Aug, with average highs of 30.6°C.
Where to stay
See Joetsu hotels · Book Joetsu tours & activities
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Climate data: Open-Meteo Historical (ERA5), 1991–2020 climate normals.
Licensed under CC BY 4.0.
Open-Meteo.