Jōetsu in September
6.8out of 10
Possible, with caveats
Warm and comfortable: highs around 26°C. Frequent rain: about 14 rainy days.
26°CAvg high
20°CAvg low
14Rainy days (162 mm)
12:13 hDaylight
05:35Sunrise · 17:48 Sunset
Why this score
- Warm and comfortable: highs around 26°C
- Frequent rain: about 14 rainy days
What to wear and pack
- T-shirts and light layers
- Rain jacket or compact umbrella
How reliable is the forecast?
Rainfall in September is fairly consistent from year to year (2.9 days). Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 5°C | 1°C | 254 mm | 26 | – | – | 3.3 |
| February | 6°C | 1°C | 179 mm | 21 | – | – | 3.4 |
| March | 9°C | 3°C | 143 mm | 18 | – | – | 4.3 |
| April | 15°C | 8°C | 98 mm | 13 | – | – | 6.2 |
| May | 21°C | 14°C | 91 mm | 11 | – | – | 7.4 |
| June | 24°C | 18°C | 118 mm | 12 | – | – | 7.3 |
| July | 28°C | 22°C | 189 mm | 14 | – | – | 6.7 |
| August | 30°C | 24°C | 124 mm | 12 | – | – | 7.0 |
| September | 26°C | 20°C | 162 mm | 14 | – | – | 6.8 |
| October | 20°C | 14°C | 163 mm | 15 | – | – | 6.4 |
| November | 14°C | 9°C | 179 mm | 19 | – | – | 4.9 |
| December | 8°C | 4°C | 249 mm | 24 | – | – | 3.9 |
Frequently asked questions
How hot is Jōetsu in September?
Daytime highs average 26°C and nights about 20°C.
When is the best time to visit Jōetsu?
The best months are May, June, August.