Jeju Weather in October: What to Expect
In October, Jeju averages highs of 20.5°C and lows of 16.1°C, with about 11 rainy days (~161 mm). Verdict: Good — comfortable — manageable 20.5°C days. That makes it the 2nd hottest of South Korea's 6 main cities this month.
Jeju vs other South Korea cities in October
South Korea is not one climate. In October, Busan runs to 20.6°C while Sokcho sits at 18.3°C — a 2°C spread. Here is where Jeju falls:
What to pack for Jeju in October
With highs near 20.5°C and lows around 16.1°C, pack layers — a light jacket for mornings and evenings, a compact umbrella or rain shell.
Jeju is on the coast — add swimwear; the water can feel cool for swimming this month.
What to do in Jeju in October
October's weather suits sightseeing through the day. Top sights:
Public holidays in South Korea, October
- 2026-10-05 — National Foundation Day
- 2026-10-09 — Hangul Day
- 2027-10-04 — National Foundation Day
- 2027-10-11 — Hangul Day
Jeju in October — FAQs
What is the weather like in Jeju in October?
In October, Jeju averages daytime highs of 20.5°C and overnight lows around 16.1°C, with roughly 11 rainy days and about 161 mm of rain across the month. Good — comfortable — manageable 20.5°C days.
Is October a good time to visit Jeju?
Good — comfortable. October is comfortable enough for full-day sightseeing in Jeju. Among South Korea's cities, Jeju is the 2nd hottest this month.
What should I pack for Jeju in October?
For October (16.1–20.5°C), pack layers — a light jacket for mornings and evenings, a compact umbrella or rain shell.
What is there to do in Jeju in October?
Jeju's main sights include Jeju Volcanic Island and Lava Tubes, Hallasan National Park, Dadohaehaesang National Park. The weather suits visiting these comfortably through the day.
Are there public holidays in South Korea in October?
Yes — National Foundation Day (2026-10-05), Hangul Day (2026-10-09), National Foundation Day (2027-10-04), Hangul Day (2027-10-11). Sites can be busier or closed around these dates.
Jeju weather by month: