Jeju weather in July
Temperature, sea and sunshine in July: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in July
Good
Best time to visit: April – June, September – October
What is the weather like in Jeju in July?
In July, Jeju is hot: daytime highs average 27 °C, and even at night it stays warm at around 24 °C. The sea averages 24.2 °C – pleasant for swimming. Expect around 6 hours of sunshine a day. It rains often – on about 17 days, adding up to 230 mm. The air is often humid and muggy. All in all, July is a good month for a holiday in Jeju.
July compared
How the weather changes from June to August. Tap a month to open it.
More details for July
- Daylight
- 14 h 11 min05:34 – 19:45
- UV index
- 11 · extremeclear sky, noon (estimate)All months
- Muggy days
- 31 daysdew point 18 °C or moreAll months
- Wind
- 17 km/haverage daily peakAll months
- Cloud cover
- 73 %on averageAll months
- Hot days
- 3 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 %96 %
- Sunshineweight 20 %52 %
- Few rainy daysweight 30 %9 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in July
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Insect repellent
- Rain jacket or umbrella
Jeju in July: quick answers
Is Jeju hot in July?
Yes. In July, Jeju is hot: daytime highs average 27 °C and nights stay around 24 °C. On about 3 days the thermometer climbs to 30 °C or more.
Can you swim in Jeju in July?
Yes. In July the sea averages 24.2 °C – pleasant for swimming.
Does it rain much in Jeju in July?
It rains often – on about 17 days, adding up to 230 mm.
Jeju month by month
The whole year in JejuAll destinations: South KoreaWhere to go in JulySea temperature in July
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