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

August 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
The last month of the summer, August, is also a moderately hot month in Jeju, South Korea, with temperature in the range of an average low of 24.3°C (75.7°F) and an average high of 29.8°C (85.6°F).

Temperature

August is the warmest month, with an average high-temperature of 29.8°C (85.6°F) and an average low-temperature of 24.3°C (75.7°F).

Heat index

In August, the average heat index is calculated to a sweltering 36.1°C (97°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'feels like', 'real feel', or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (clothing, differences in body mass, height, and shape, wind). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Jeju, the average relative humidity is 76.5%.

Rainfall

August is the month with the most rainfall in Jeju. Rain falls for 13.5 days and accumulates 262.5mm (10.3") of precipitation.

Sea temperature

With an average sea temperature of 26.2°C (79.2°F), August is the month with the warmest seawater in Jeju.
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

The average length of the day in August is 13.4h.

Sunshine

In August, the average sunshine is 6.3h.

UV index

In Jeju, the average daily maximum UV index in August is 10. A UV Index reading of 8 to 10 represents a very high threat to health from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 10 interpret into the following advice:
Take extra precautions. Protection against sun damage is required. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the warmest month in Jeju?

August is the warmest month, with an average high-temperature of 29.8°C (85.6°F) and an average low-temperature of 24.3°C (75.7°F).

What is the temperature in August in Jeju?

In Jeju, South Korea, in August, the average high-temperature is 29.8°C (85.6°F), and the average low-temperature is 24.3°C (75.7°F). The average heat index (a.k.a. 'apparent temperature', 'feels like'), that combines both air temperature and relative humidity, in August is calculated to 36.1°C (97°F).

What is the average humidity in August in Jeju?

In Jeju, the average relative humidity in August is 76.5%.

How much does it rain in Jeju in August?

In Jeju, South Korea, in August, during 13.5 rainfall days, 262.5mm (10.3") of precipitation is typically accumulated.

What is the rainiest month in Jeju?

August is the month with the most rainfall in Jeju, South Korea. Rain falls for 13.5 days and accumulates 262.5mm (10.3") of precipitation.

What is the month with the warmest sea water in Jeju?

August is the month with the warmest seawater in Jeju, with an average sea temperature of 26.2°C (79.2°F).

How warm is the water in August in Jeju?

In Jeju, South Korea, the average seawater temperature in August is 26.2°C (79.2°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

How many hours of daylight does Jeju have in August?

In August, the average length of the day is 13.4h.

How long on average sun shines in August in Jeju?

The average sunshine in August in Jeju, South Korea, is 6.3h.

How high is the UV index in August in Jeju?

In Jeju, the average daily maximum UV index in August is 10. A UV Index reading of 8 to 10 represents a very high hazard to health from the exposure to the Sun's UV radiation.
Average temperature in August - Jeju, South Korea
  • Average high temperature in August: 29.8°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 August: 24.3°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 August - Jeju, South Korea
  • Average humidity in August: 76.5%

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 August - Jeju, South Korea
  • Average rainfall in August: 262.5mm

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 August - Jeju, South Korea
  • Average rainfall days in August: 13.5 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 August - Jeju, South Korea
  • Average sea temperature in August: 26.2°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 August / Average sunshine in August - Jeju, South Korea
  • Average daylight in August: 13.4h

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 August: 6.3h

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

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).