July weather forecast
Jeju, South Korea

With temperatures peaking to 29°C (84.2°F), July is the hottest month in Jeju, marking the zenith of summer. The abundant sunshine illuminates the crystal-clear waters surrounding the island, their warmth inviting for various water activities. However, it is also the rainiest period, with heavy downpours turning the island into a scenic wonder, often followed by picturesque views of rainbows. Despite favorable beach conditions, visitors must keep track of the weather updates due to periodic typhoons hitting the island. Amid this blend of heat, rain, and typhoons, July continues to magnetize thrill-seekers and explorers.

Temperature

July witnesses a subtle temperature ascent, adjusting from 24.8°C (76.6°F) in June to a still moderately hot 29°C (84.2°F). In Jeju, July is marked by an average low-temperature of 23.3°C (73.9°F).

Heat index

The heat index in July is appraised at a tropical 34°C (93.2°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'feels like' or 'apparent temperature', gives a temperature feeling by integrating air temperature and humidity. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.

Humidity

With an average relative humidity of 78.3%, July is the most humid month.

Rainfall

In Jeju, South Korea, in July, it is raining for 12.5 days, with typically 240mm (9.45") of accumulated precipitation. In Jeju, South Korea, during the entire year, the rain falls for 130.2 days and collects up to 1498mm (58.98") of precipitation.

Sea temperature

In Jeju, the average seawater temperature in July is 24.5°C (76.1°F).
Note: When thinking about a swim in 24.5°C (76.1°F) waters, consider your cold tolerance, the day's sunshine, wind, and air temperature. It is a fun fact that Olympic swimmers dive into waters of 25°C (77°F) to 28°C (82.4°F).

Daylight

In Jeju, South Korea, the average length of the day in July is 14h and 8min.
On the first day of the month, sunrise is at 05:27 and sunset at 19:47. On the last day of July, sunrise is at 05:45 and sunset at 19:34 KST.

Sunshine

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

UV index

July is the month with the highest UV index, with an average maximum UV index of 11. A UV Index value of 11, and more, symbolizes an ultimate health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index, 11 in July, converts into the following recommendations:
Utilize all necessary safety measures, unprotected skin could suffer burns instantly. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Boost your sun resistance with garments that are densely woven yet spacious. Despite the cloudy weather, sunscreen with a sun protection factor of at least 30 should be liberally applied and reapplied, including after a swim or outdoor activity. Caution! The Sun's UV intensity grows with reflections off sand and water.