Incheon weather in May
May in Incheon: nice, rainy — one of the best months to visit.
#1 of 12 months in Incheon · #197 of 897 destinations to visit in May · comfort 89/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Incheon in May
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Incheon climate normals — May
| Daytime high | 20°C / 68°F | 😎 nice |
|---|---|---|
| Nighttime low | 13°C / 55°F | |
| Rainfall | 91 mm / 3.6 in | 🌧 rainy |
| Rainy days | 8 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 11°C / 52°F | |
| Sunshine | 10.1 h/day | |
| Daylight | 14.2 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 86 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Incheon in May — FAQ
- Is May a good time to visit Incheon?
- May in Incheon: nice, rainy — one of the best months to visit. It ranks #1 of 12 months for Incheon on SeasonMap's comfort score (89/100).
- What is the weather like in Incheon in May?
- In May, Incheon averages a daily high of 20.1°C and a low of 12.6°C, with about 90.5 mm of rain over roughly 8.4 rainy days.
- What is the air quality in Incheon in May?
- Incheon has a mean US Air Quality Index of about 86 in May.