August weather forecast
Jeju, South Korea

August continues the narrative of a warm, wet summer in Jeju. With the mercury hitting a high of 29.8°C (85.6°F), the weather remains hot but slightly less severe than July. As sea temperatures rise, opportunities for snorkeling, diving, and swimming multiply, adding to Jeju's summer euphoria. While humidity levels stay high, they do bring along brief spells of respite in the form of generous showers. Despite summer being at its tail end, the island doesn't lose its charm, radiating beauty through its myriad natural wonders.

Temperature

Jeju's temperatures tend to reach their peak averages in August, with a high of 29.8°C (85.6°F) and a low of 24.3°C (75.7°F).

Heat index

The heat index value for August is appraised at a fiery hot 36°C (96.8°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Be advised, the heat index considers values for conditions in shade and with a light breeze. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is an estimation of the warmth sensation when considering humidity levels. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

In August, the average relative humidity is 76.5%.

Rainfall

August is the month with the most rainfall. Rain falls for 13.5 days and accumulates 263mm (10.35") of precipitation.

Sea temperature

With an average sea temperature of 26.2°C (79.2°F), August is the month with the warmest seawater.
Note: Ideal surface water temperatures for any water activity fall between 25°C (77°F) and 29°C (84.2°F), offering maximum enjoyment for lengthened periods.

Daylight

The average length of the day in August is 13h and 23min.
On the first day of the month, sunrise is at 05:46 and sunset at 19:33. On the last day of August, sunrise is at 06:07 and sunset at 19:00 KST.

Sunshine

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

UV index

In Jeju, the average daily maximum UV index in August is 10. A UV Index estimate of 8 to 10 represents a very high health risk from exposure to the Sun's UV radiation for average individuals.
Note: In August, the UV index of 10 transforms into the following advice:
Take all necessary measures. Eyes and skin are at risk if left unprotected. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Even on overcast days, ensure the application and frequent reapplication of sunscreen with at least an SPF 30, especially post swim or outdoor exercise. Be vigilant! The Sun's UV rays get a boost from sand and water reflections.