Verdict: Excellent month
Jeju Weather in October
October hits the sweet spot in Jeju — highs around 21°C (70°F), ideal for a full day on foot. Expect showers on roughly 10 days of the month — rarely trip-ruining, worth planning around. Overall, October is one of the best months of the year to be in Jeju.
Average high
21°C / 70°F
Average low
16°C / 61°F
Rain days
~10
Precipitation
86 mm
What to pack for Jeju in October
- Layers — t-shirts under a light jacket or sweater
- A packable rain shell or compact umbrella earns its space
- Comfortable walking shoes — every guide on this site assumes you'll use them
October against the rest of the year
Warmest in Jeju: Aug (30°C / 86°F) · Coolest: Jan (8°C / 46°F) · Wettest: Jul (~20 rain days)
8°
3°
Jan
10°
4°
Feb
14°
7°
Mar
17°
11°
Apr
22°
15°
May
25°
20°
Jun
29°
24°
Jul
30°
25°
Aug
26°
22°
Sep
21°
16°
Oct
16°
11°
Nov
9°
5°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)