Jeju weather in June
Temperature, sea and sunshine in June: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in June
Good
Best time to visit: April – June, September – October
What is the weather like in Jeju in June?
In June, Jeju is warm: daytime highs average 23 °C, and nights cool down to about 20 °C. The sea averages 20.1 °C – refreshing for a swim. Expect around 5 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 222 mm in total. The air is often humid and muggy. All in all, June is a good month for a holiday in Jeju.
June compared
How the weather changes from May to July. Tap a month to open it.
More details for June
- Daylight
- 14 h 22 min05:23 – 19:45
- UV index
- 11 · extremeclear sky, noon (estimate)All months
- Muggy days
- 16 daysdew point 18 °C or moreAll months
- Wind
- 15 km/haverage daily peakAll months
- Cloud cover
- 75 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+9Asia/Seoul
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %38 %
- Few rainy daysweight 30 %34 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in June
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Insect repellent
- Rain jacket or umbrella
Jeju in June: quick answers
Is Jeju hot in June?
Warm rather than hot: in June, daytime highs in Jeju average 23 °C and nights cool to about 20 °C.
Can you swim in Jeju in June?
Yes. In June the sea averages 20.1 °C – refreshing for a swim.
Does it rain much in Jeju in June?
Rain is frequent, with about 13 rainy days and 222 mm in total.
Jeju month by month
The whole year in JejuAll destinations: South KoreaWhere to go in JuneSea temperature in June
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences