Jeju in Summer — Weather & What to Expect
Summer in Jeju (June, July, August) averages daytime highs of 28.2°C and lows of 23.3°C, with around 731.0mm of rain across the season (51 rainy days in total). It includes some of the best months of the year to visit (June, July, August).
In the northern hemisphere, summer in Jeju covers June, July, August.
Summer in Jeju month by month
| Month | High | Low | Rain | Rainy days | Rating |
|---|---|---|---|---|---|
| June | 25.7°C | 20.3°C | 199.9mm | 13 | 9/10 |
| July | 28.8°C | 24.2°C | 271.7mm | 19 | 8/10 |
| August | 30.0°C | 25.4°C | 259.4mm | 19 | 8/10 |
What to pack for Jeju in summer
- Light layers
- Sunscreen
- T-shirts and light trousers or shorts
- Compact travel umbrella
- Waterproof jacket
- Quick-dry clothing
Frequently Asked Questions
Is summer a good time to visit Jeju?
Summer in Jeju rates around 8/10 — good time to visit. Average highs are 28.2°C with 731.0mm of rain across the season.
How hot is Jeju in summer?
Daytime highs average 28.2°C (82.8°F) across June, July, August, with nights around 23.3°C.
What months are summer in Jeju?
Jeju is in the northern hemisphere, so summer covers June, July, August.
See also: best time to visit Jeju · Jeju annual climate · Jeju in spring · Jeju in autumn · Jeju in winter
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Once you know what summer in Jeju looks like, find out exactly what to pack for Jeju at 247PackingList. For currency, language and country facts, see the South Korea guide at 247CountryInfo.
Summer in Jeju — what to pack
Travel clothing layers
Pack layers — temperatures can vary significantly between day and night.
Check Price →Check clothing sizes in South Korea at 247Sizing before you shop.
More summer travel essentials
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.