Monthly climate guide
Jeju weather in October
With highs near 20°C (69°F) and lows around 18°C (64°F), October feels mild in Jeju. Rainfall averages about 106 mm (wet) and the sky is often cloudy. Daytime highs are 4°C cooler than September and 5°C warmer than November.
What stands out in October
- It's one of the sunniest months here, with cloud cover around 59%.
- Jeju is usually about 2°C warmer than Daejeon, 330 km away, in October.
- Days and nights are close, only about 2°C apart.
- Seasonally, October counts as mid-autumn in Jeju.
Avg high
20°C
69°F
Avg low
18°C
64°F
Rainfall
106 mm
wet
Humidity
74%
relative
Sky
59%
cloud · often cloudy
Jeju weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 8°C / 47°F | 6°C / 43°F | 47 mm | 77% | 77% |
| February | 9°C / 48°F | 6°C / 43°F | 61 mm | 75% | 76% |
| March | 11°C / 52°F | 8°C / 47°F | 91 mm | 74% | 67% |
| April | 15°C / 58°F | 12°C / 53°F | 142 mm | 79% | 68% |
| May | 18°C / 64°F | 15°C / 60°F | 122 mm | 84% | 72% |
| June | 22°C / 71°F | 20°C / 67°F | 179 mm | 89% | 82% |
| July | 26°C / 78°F | 24°C / 75°F | 195 mm | 90% | 74% |
| August | 28°C / 82°F | 26°C / 79°F | 243 mm | 84% | 66% |
| September | 24°C / 76°F | 22°C / 72°F | 180 mm | 80% | 68% |
| October | 20°C / 69°F | 18°C / 64°F | 106 mm | 74% | 59% |
| November | 16°C / 60°F | 13°C / 56°F | 88 mm | 74% | 68% |
| December | 11°C / 51°F | 8°C / 46°F | 63 mm | 76% | 77% |
What to pack for October
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is October a good time to visit Jeju?
Compare the months in the chart above to find your ideal window.
Best time to visit Jeju →Other South Korea cities in October
Cite or embed this data
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Jeju weather in October. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/south-korea/jeju/october
<a href="https://weathercompare.eu/weather/south-korea/jeju/october">Jeju weather in October</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/south-korea/jeju" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Jeju weather in October"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/south-korea/jeju/october">Jeju weather in October</a> – WeatherCompare</p>
Jeju in October: quick answers
Is October a good time to visit Jeju?
Yes. October is one of the best months for Jeju, with highs around 20°C and about 106 mm of rain.
How warm is Jeju in October?
Average highs are about 20°C (69°F) and average lows about 18°C (64°F), based on 10 years of daily data.
Does it rain a lot in Jeju in October?
Jeju typically gets around 106 mm of rain in October — wet.
Figures are long-term averages for the area around Jeju (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.