Jeju weather in October
October in Jeju: nice, a little rain, with clean air — one of the best months to visit.
#1 of 12 months in Jeju · #326 of 897 destinations to visit in October · comfort 83/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Jeju in October
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Jeju climate normals — October
| Daytime high | 21°C / 70°F | 😎 nice |
|---|---|---|
| Nighttime low | 18°C / 64°F | |
| Feels like (high) | 20°C / 68°F | |
| Rainfall | 42 mm / 1.6 in | 🌦 some rain |
| Rainy days | 7 days | |
| Humidity | 69% | 💧 humid |
| Dew point | 13°C / 56°F | |
| Sunshine | 8.8 h/day | |
| Daylight | 11.3 h | |
| Wind | 25 km/h / 15 mph | |
| Air quality (US AQI) | 49 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Jeju in October — FAQ
- Is October a good time to visit Jeju?
- October in Jeju: nice, a little rain, with clean air — one of the best months to visit. It ranks #1 of 12 months for Jeju on SeasonMap's comfort score (83/100).
- What is the weather like in Jeju in October?
- In October, Jeju averages a daily high of 21°C and a low of 17.9°C, with about 41.5 mm of rain over roughly 6.8 rainy days.
- What is the air quality in Jeju in October?
- Jeju has a mean US Air Quality Index of about 49 in October.