Jeju
South Korea
Long-term weather forecast
Long-term weather forecast

April weather forecast and climate
Jeju, South Korea

A high sunrise Panorama of the Jeju Island in Jeju, South Korea
A high sunrise Panorama of the Jeju Island in Jeju, South Korea
April is a comfortable spring month in Jeju, South Korea, with temperature in the range of an average low of 10.2°C (50.4°F) and an average high of 17.5°C (63.5°F).

Temperature

In Jeju, the average high-temperature in April slightly increases, from a cool 12.8°C (55°F) in March, to an enjoyable 17.5°C (63.5°F). In April, the average low-temperature is 10.2°C (50.4°F).

Humidity

In April, the average relative humidity in Jeju is 66.5%.

Rainfall

In April, the rain falls for 10 days. Throughout April, 89.6mm (3.5") of precipitation is accumulated. Throughout the year, in Jeju, there are 130.2 rainfall days, and 1497.7mm (59") of precipitation is accumulated.

Sea temperature

In Jeju, the average water temperature is 14.7°C (58.5°F).
Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

Daylight

The average length of the day in April is 13h.

Sunshine

The average sunshine in Jeju is 6.5h.

UV index

In Jeju, the average daily maximum UV index in April is 8. A UV Index estimate of 8 to 10 represents a very high health risk from the exposure to the Sun's UV radiation for the average person.
Note: In April, the average maximum UV index of 8 translate into the following recommendations:
Take special precautions, as unprotected skin can be damaged and can burn quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in April in Jeju?

In Jeju, in April, the average high-temperature is 17.5°C (63.5°F), and the average low-temperature is 10.2°C (50.4°F).

What is the average humidity in April in Jeju?

In April, the average relative humidity is 66.5%.

How much does it rain in Jeju in April?

In April, in Jeju, the rain falls for 10 days. Throughout April, 89.6mm (3.5") of precipitation is accumulated.

What is the sea water temperature in April in Jeju?

In Jeju, South Korea, the average seawater temperature in April is 14.7°C (58.5°F). Swimming in 14.7°C (58.5°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the average length of the day in April in Jeju?

In Jeju, South Korea, the average length of the day in April is 13h.

How long on average sun shines in April in Jeju?

In April, the average sunshine in Jeju is 6.5h.

What is the UV index intensity in April in Jeju?

The average daily maximum UV index in April is 8. A UV Index reading of 8 to 10 represents a very high health threat from the exposure to the Sun's UV radiation.
Average temperature in April - Jeju, South Korea
  • Average high temperature in April: 17.5°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 April: 10.2°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 April - Jeju, South Korea
  • Average humidity in April: 66.5%

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

Average rainfall in April - Jeju, South Korea
  • Average rainfall in April: 89.6mm

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

Average rainfall days in April - Jeju, South Korea
  • Average rainfall days in April: 10 days

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

Average sea temperature in April - Jeju, South Korea
  • Average sea temperature in April: 14.7°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 April / Average sunshine in April - Jeju, South Korea
  • Average daylight in April: 13h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 10h).

  • Average sunshine in April: 6.5h

The month with most sunshine is May (Average sunshine: 6.8h).
The month with least sunshine is January (Average sunshine: 2.3h).

Average UV index in April - Jeju, South Korea
  • Average UV index in April: 8

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