August maintains the peak of summer in
Seoul, with sultry weather and intense rain showers. It is a typical sight to see locals sipping on cold buckwheat noodles to keep cool. Outdoor enthusiasts will relish in the magnificent sunsets along the Han River despite the high humidity. It is the city's hottest month, with the highest mean temperature reaching up to 29.6°C (85.3°F). As
September approaches, signs of autumn begin to peek through the summer haze.
Temperature
Seoul experiences its highest temperatures in August, with an average peak of 29.6°C (85.3°F) and a low of 22.4°C (72.3°F).
Heat index
August's mean heat index is computed to be a fiery hot 35°C (95°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.
Humidity
The average relative humidity in August is 75.6%.
Rainfall
In Seoul, in August, it is raining for 14.6 days, with typically 364mm (14.33") of accumulated precipitation. Throughout the year, there are 108.8 rainfall days, and 1451mm (57.13") of precipitation is accumulated.
Daylight
In Seoul, the average length of the day in August is 13h and 35min.
On the first day of the month, sunrise is at 05:36 and sunset at 19:40. On the last day of August, sunrise is at 06:01 and sunset at 19:03 KST.
Sunshine
In Seoul, the average sunshine in August is 4.9h.
UV index
The average daily maximum UV index in August is 9. A UV Index value of 8 to 10 symbolizes a very high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: In August, the maximum UV index of 9 suggests these recommendations:
Always be mindful of protection. The risk of damage to skin and eyes is significant if neglected. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Experience reduced UV exposure by about half when donning a wide-brim hat. Even if it's cloudy, generously apply and frequently reapply a sunscreen with no less than a 30 sun protection factor after each swim or outdoor exercise.