Typically the weather in Ulsan right through September is 20. Throughout the month you should see a high of 26 and average daily low being 17 celsius. The table below includes more detail:
| Month | Degrees Celsius |
|---|---|
| Temperature | 20 |
| High Temperature | 26 |
| Low Temperature | 17 |
Useful Links: Ulsan Weather: Average Weather & Yearly Climate