June weather forecast
Jeju, South Korea

June in Jeju marks the onset of summer, with temperatures soaring up to 24.8°C. The month sees a perceptible change in the island's ambiance, notably with longer daylight hours. As the ocean gets warmer, the beach season officially commences, attracting swimmers, surfers, and sunbathers. June also signals a surge in humidity levels, making the weather feel slightly hotter than actual temperatures, a characteristic feature of a tropical summer. Despite the occasional showers, tourists can enjoy diverse activities, including forest trails and outdoor festivals showcasing Jeju's rich culture.

Temperature

The arrival of June introduces a minor uplift in high-temperatures, adjusting from a pleasant 21.6°C in May to a warm 24.8°C. June brings Jeju a consistent average low-temperature of 18.7°C.

Humidity

In Jeju, the average relative humidity in June is 76.8%.

Rainfall

In Jeju, during June, the rain falls for 11.8 days and regularly aggregates up to 181mm of precipitation. Throughout the year, there are 130.2 rainfall days, and 1498mm of precipitation is accumulated.

Sea temperature

In Jeju, South Korea, the average seawater temperature in June is 20.6°C.
Note: The majority of individuals do not enjoy swimming in water that is 20.6°C. Breathing control becomes more challenging as the water temperature dips from 21°C to 15°C.

Daylight

The month with the longest days is June, with an average of 14h and 18min of daylight.
On the first day of the month, sunrise is at 05:25 and sunset at 19:38. On the last day of June, in Jeju, sunrise is at 05:26 and sunset at 19:47 KST.

Sunshine

In June, the average sunshine is 5.7h.

UV index

The average daily maximum UV index in June in Jeju is 10. A UV Index value of 8 to 10 symbolizes a very high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The maximum UV index of 10 during June leads to these instructions:
With the absence of protection, damage to skin and eyes can occur instantly. Ensure precautions are taken. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.