Seoul weather in May
May in Seoul: nice, rainy — one of the best months to visit.
#1 of 12 months in Seoul · #82 of 604 destinations to visit in May · comfort 90/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Seoul climate normals — May
| Daytime high | 23°C / 73°F | 😎 nice |
|---|---|---|
| Nighttime low | 12°C / 54°F | |
| Feels like (high) | 22°C / 72°F | |
| Rainfall | 96 mm / 3.8 in | 🌧 rainy |
| Rainy days | 8 days | |
| Humidity | 67% | 💧 humid |
| Dew point | 10°C / 51°F | |
| Sunshine | 10.1 h/day | |
| Daylight | 14.2 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 86 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Seoul?
Loading map…
Seoul in May — FAQ
- Is May a good time to visit Seoul?
- May in Seoul: nice, rainy — one of the best months to visit. It ranks #1 of 12 months for Seoul on SeasonMap's comfort score (90/100).
- What is the weather like in Seoul in May?
- In May, Seoul averages a daily high of 22.5°C and a low of 12°C, with about 95.7 mm of rain over roughly 8.2 rainy days.
- What is the air quality in Seoul in May?
- Seoul has a mean US Air Quality Index of about 86 in May.