June weather forecast
Jeju, South Korea

June in Jeju marks the onset of summer, with temperatures soaring up to 24.8°C (76.6°F). 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 in Jeju introduces a minor uplift in high-temperatures, adjusting from a pleasant 21.6°C (70.9°F) in May to a warm 24.8°C (76.6°F). In Jeju, the average low-temperature during the month of June is a refreshing 18.7°C (65.7°F).

Humidity

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

Rainfall

In Jeju, South Korea, in June, it is raining for 11.8 days, with typically 181mm (7.13") of accumulated precipitation. Throughout the year, in Jeju, there are 130.2 rainfall days, and 1498mm (58.98") of precipitation is accumulated.

Sea temperature

In Jeju, South Korea, in June, the average water temperature is 20.6°C (69.1°F).
Note: Most individuals do not find swimming at 20.6°C (69.1°F) to be enjoyable. As the water temperature declines below 21°C (69.8°F), maintaining control over one's breathing becomes harder.

Daylight

June has the longest days of the year in Jeju, with an average of 14h and 18min of daylight.
On the first day of June, sunrise is at 05:24 and sunset at 19:38. On the last day of the month, sunrise is at 05:27 and sunset at 19:47 KST.

Sunshine

In Jeju, the average sunshine in June is 5.7h.

UV index

In Jeju, the average daily maximum UV index in June is 10. A UV Index reading of 8 to 10 represents a very high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: A maximum high UV index of 10 in June translates into the following recommendations:
Protection is paramount; otherwise, swift harm can come to the skin and eyes. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun.