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, 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

In Jeju, August is the month with the highest recorded average temperatures, measuring a high of 29.8°C and a low of 24.3°C.

Heat index

For August, the heat index is computed to be a torrid 36°C. Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.
In terms of the heat index, values are set with light wind and shade conditions in mind. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'real feel' or 'feels like', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are largely significant for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

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

Rainfall

The month with the most rainfall is August, when the rain falls for 13.5 days and typically aggregates up to 263mm of precipitation.

Sea temperature

With an average sea temperature of 26.2°C, August is the month with the warmest seawater.
Note: In any water activity, temperatures between 25°C and 29°C are viewed as magnificent and exceptionally pleasant for prolonged enjoyment.

Daylight

In August, the average length of the day is 13h and 23min.
On the first day of August, sunrise is at 05:45 and sunset at 19:34. On the last day of the month, sunrise is at 06:06 and sunset at 19:01 KST.

Sunshine

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

UV index

In Jeju, the average daily maximum UV index in August is 10. A UV Index value of 8 to 10 symbolizes a very high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In August, a daily UV index of 10 turns into the following recommendations:
Stay protected; otherwise, skin and eyes can suffer rapid damage. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Even under cloud cover, use sunscreen with at least an SPF 30 generously and reapply frequently post every swim or outdoor exercise. Be on guard! The reflective nature of sand and water boosts UV exposure.