Ulsan in September
7.2out of 10
Possible, with caveats
Warm and comfortable: highs around 26°C. Frequent rain: about 11 rainy days.
26°CAvg high
19°CAvg low
11Rainy days (172 mm)
12:13 hDaylight
06:11Sunrise · 18:23 Sunset
Why this score
- Warm and comfortable: highs around 26°C
- Frequent rain: about 11 rainy days
What to wear and pack
- T-shirts and light layers
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in September varies a lot between years (±3.9 rainy days), so check the forecast closer to your trip. 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 | 7°C | -2°C | 32 mm | 5 | – | – | 5.8 |
| February | 9°C | 0°C | 39 mm | 5 | – | – | 6.1 |
| March | 13°C | 4°C | 71 mm | 8 | – | – | 6.7 |
| April | 19°C | 9°C | 92 mm | 8 | – | – | 7.4 |
| May | 23°C | 14°C | 99 mm | 8 | – | – | 8.0 |
| June | 25°C | 18°C | 147 mm | 9 | – | – | 7.5 |
| July | 28°C | 23°C | 213 mm | 13 | – | – | 6.7 |
| August | 29°C | 24°C | 214 mm | 14 | – | – | 6.5 |
| September | 26°C | 19°C | 172 mm | 11 | – | – | 7.2 |
| October | 21°C | 13°C | 74 mm | 5 | – | – | 8.3 |
| November | 15°C | 6°C | 46 mm | 5 | – | – | 7.4 |
| December | 9°C | 0°C | 27 mm | 3 | – | – | 6.4 |
Frequently asked questions
How hot is Ulsan in September?
Daytime highs average 26°C and nights about 19°C.
When is the best time to visit Ulsan?
The best months are October, May.