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 in Jeju, South Korea, is a comfortable spring month, with average temperature ranging between min 10.2°C (50.4°F) and max 17.5°C (63.5°F).

Temperature

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

Humidity

The average relative humidity in April is 66.5%.

Rainfall

In Jeju, during April, the rain falls for 10 days and regularly aggregates up to 89.6mm (3.5") of precipitation. 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). 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.

Daylight

The average length of the day is 13h.

Sunshine

In Jeju, the average sunshine is 6.5h.

UV index

In April, the average daily maximum UV index in Jeju is 8. A UV Index reading of 8 to 10 represents a very high health vulnerability from unsafe exposure to the UV radiation for the average person.
The daily maximum UV index of 8 interpret into the following advice:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in April in Jeju?

In April, in Jeju, South Korea, 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 in Jeju is 66.5%.

How many days does it rain in April in Jeju?

In April, 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, in April, the average water temperature is 14.7°C (58.5°F). Swimming in 14.7°C (58.5°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Jeju have in April?

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

How many hours of sunshine does Jeju have in April?

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

What is the UV index reading in April in Jeju?

The average daily maximum UV index in April in Jeju, South Korea, is 8. A UV Index of 8 to 10 symbolizes a very high health risk from the exposure to the Sun's UV rays.
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).