Generally the typical temperate in Seoul in May is 15. Through the month the highs are about 22 and low of 11. Our table below has the full details:
| Month | Degrees Celsius |
|---|---|
| Temperature | 15 |
| High Temperature | 22 |
| Low Temperature | 11 |
| Sunshine Per Day | 8 |
Useful Links: Seoul Weather: Average Weather & Yearly Climate