June weather forecast
Jeju, South Korea

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A high sunrise Panorama of the Jeju Island in Jeju, South Korea
A high sunrise Panorama of the Jeju Island in Jeju, South Korea

Weather in June

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 start of June brings a subtle shift in the average high-temperature, edging up from May's agreeable 21.6°C (70.9°F) to a warm 24.8°C (76.6°F). The average nighttime temperature lowers to a comfortable 18.7°C (65.7°F) throughout June.

Humidity

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

Rainfall

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

Sea temperature

In Jeju, in June, the average water temperature is 20.6°C (69.1°F).
Note: In water of 20.6°C (69.1°F), the majority of people do not enjoy swimming. Breathing becomes increasingly hard to manage as the temperature drops from 21°C (69.8°F) to 15°C (59°F).

Daylight

With an average of 14h and 18min of daylight, June has the longest days of the year.
On the first day of the month, sunrise is at 05:24 and sunset at 19:38. On the last day of June, sunrise is at 05:27 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 is 10. A UV Index of 8 to 10 symbolizes a very high health hazard from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index of 10 in June interprets into the following recommendations:
Take extra precautions. Protection against sun damage is required. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.

Frequently asked questions

What are the temperatures in June?

June temperatures vary between a high-temperature of 24.8°C (76.6°F) and a low-temperature of 18.7°C (65.7°F).

What is the average humidity in June?

The average relative humidity in June is 76.8%.

How much does it rain in June?

In Jeju, in June, it is raining for 11.8 days, with typically 181mm (7.13") of accumulated precipitation.

How cold is the water in June?

In Jeju, in June, the average water temperature is 20.6°C (69.1°F). Swimming in 20.6°C (69.1°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

When are the longest days?

With an average of 14h and 18min of daylight, June has the longest days of the year.

How many hours of daylight does Jeju have in June?

The average day length in June is 14h and 20min.

When is the sunrise / sunset in June?

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.

How many hours of sunshine does Jeju have in June?

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

What is the UV index reading in June?

The average daily maximum UV index in June is 10. A UV Index value of 8 to 10 symbolizes a very high hazard to health from exposure to the Sun's UV radiation.

Average temperature in June
Jeju, South Korea

Average temperature in June - Jeju, South Korea
  • Average high temperature in June: 24.8°C

The warmest month (with the highest average high temperature) is August (29.8°C).
The month with the lowest average high temperature is January (8.3°C).

  • Average low temperature in June: 18.7°C

The month with the highest average low temperature is August (24.3°C).
The coldest month (with the lowest average low temperature) is January (3.2°C).

Average humidity in June
Jeju, South Korea

Average humidity in June - Jeju, South Korea
  • Average humidity in June: 76.8%

The month with the highest relative humidity is July (78.3%).
The months with the lowest relative humidity are February and March (64.9%).

Average rainfall in June
Jeju, South Korea

Average rainfall in June - Jeju, South Korea
  • Average rainfall in June: 181.4mm

The wettest month (with the highest rainfall) is August (262.5mm).
The driest month (with the least rainfall) is December (47.7mm).

Average rainfall days in June
Jeju, South Korea

Average rainfall days in June - Jeju, South Korea
  • Average rainfall days in June: 11.8 days

The month with the highest number of rainy days is August (13.5 days).
The month with the least rainy days is October (7 days).

Average sea temperature in June
Jeju, South Korea

Average sea temperature in June - Jeju, South Korea
  • Average sea temperature in June: 20.6°C

The best month for swimming (with the highest average sea temperature) is August (26.2°C).
The coldest month (with the lowest average sea temperature) is March (13.3°C).

Average daylight in June /
Average sunshine in June
Jeju, South Korea

Average daylight in June / Average sunshine in June - Jeju, South Korea
  • Average daylight in June: 14h and 2min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in June: 5h and 4min

The month with the most sunshine is May (Average sunshine: 6h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).

Average UV index in June
Jeju, South Korea

Average UV index in June - Jeju, South Korea
  • Average UV index in June: 10

The month with the highest UV index is July (UV index 11).
The months with the lowest UV index are January and December (UV index 3).

Jeju, South Korea

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