May weather forecast
Seoul, South Korea

May is marked by Seoul's rapid transition into summer, with more daylight hours and increasingly warm temperatures. Gardens are in full bloom and street festivals become more frequent and vibrant. Visitors and locals can enjoy outdoor dining and afternoon strolls in parks. Notably, May sees 106mm of rainfall, indicating the onset of the monsoon season. As June approaches, conditions become wetter and hotter, signifying the start of summer.

Temperature

Seoul's weather in May shows a rise in the average high-temperature, moving up from April's refreshing 17.8°C to a moderately hot 23°C. Seoul's average low-temperature in the month of May is recorded at a refreshing 13.2°C.

Humidity

The average relative humidity in May is 62.7%.

Rainfall

In Seoul, South Korea, in May, during 9 rainfall days, 106mm of precipitation is typically accumulated. In Seoul, during the entire year, the rain falls for 108.8 days and collects up to 1451mm of precipitation.

Daylight

In May, the average length of the day is 14h and 11min.
On the first day of May, sunrise is at 05:37 and sunset at 19:21. On the last day of the month, sunrise is at 05:12 and sunset at 19:46 KST.

Sunshine

May has the most sunshine of the year, with an average of 6.9h of sunshine.

UV index

The average daily maximum UV index in May is 8. A UV Index estimate of 8 to 10 represents a very high health hazard from exposure to the Sun's UV radiation for the average person.
Note: In May, the average maximum UV index of 8 translates into the following recommendations:
Being careless can result in skin and eye damage. Always take the necessary safety measures. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.