May weather forecast and climate
Seoul, South Korea

The Dongdaemun Gate in Seoul city, South Korea
The Dongdaemun Gate in Seoul city, South Korea
May, the last month of the spring, in Seoul, is a moderately hot month, with average temperature fluctuating between 23°C (73.4°F) and 13.2°C (55.8°F).

Temperature

In May, the average high-temperature rises, from a comfortable 17.8°C (64°F) in April, to a warm 23°C (73.4°F). In May, the average low-temperature is 13.2°C (55.8°F).

Humidity

The average relative humidity in Seoul is 62.7%.

Rainfall

In Seoul, during May, the rain falls for 9 days and regularly aggregates up to 105.9mm (4.17") of precipitation. Throughout the year, there are 108.8 rainfall days, and 1450.6mm (57.11") of precipitation is accumulated.

Daylight

The average length of the day in Seoul is 14.2h.

Sunshine

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

UV index

The average daily maximum UV index in Seoul is 8. A UV Index reading of 8 to 10 represents a very high health risk from the exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 8 transform into the following instructions:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in May in Seoul?

The average high-temperature, in May, in Seoul, is 23°C (73.4°F), while the average low-temperature is 13.2°C (55.8°F).

What is the average humidity in May in Seoul?

In Seoul, the average relative humidity in May is 62.7%.

How many days does it rain in May in Seoul?

In May, in Seoul, the rain falls for 9 days. Throughout May, 105.9mm (4.17") of precipitation is accumulated.

How many hours of daylight does Seoul have in May?

In Seoul, the average length of the day in May is 14.2h.

What month has the most sunshine in Seoul?

May has the most sunshine of the year in Seoul, South Korea, with an average of 6.9h of sunshine.

How many hours of sunshine does Seoul have in May?

In Seoul, the average sunshine in May is 6.9h.

How high is the UV index in May in Seoul?

The average daily maximum UV index in May in Seoul, South Korea, is 8. A UV Index reading of 8 to 10 represents a very high health risk from the exposure to the Sun's UV rays.
Average temperature in May - Seoul, South Korea
  • Average high temperature in May: 23°C

The warmest month (with the highest average high temperature) is August (29.6°C).
The month with the lowest average high temperature is January (1.5°C).

  • Average low temperature in May: 13.2°C

The month with the highest average low temperature is August (22.4°C).
The coldest month (with the lowest average low temperature) is January (-5.9°C).

Average humidity in May - Seoul, South Korea
  • Average humidity in May: 62.7%

The month with the highest relative humidity is July (78.3%).
The month with the lowest relative humidity is April (56.2%).

Average rainfall in May - Seoul, South Korea
  • Average rainfall in May: 105.9mm

The wettest month (with the highest rainfall) is July (394.7mm).
The driest month (with the least rainfall) is January (20.8mm).

Average rainfall days in May - Seoul, South Korea
  • Average rainfall days in May: 9 days

The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is February (5.8 days).

Average daylight in May / Average sunshine in May - Seoul, South Korea
  • Average daylight in May: 14.2h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in May: 6.9h

The month with the most sunshine is May (Average sunshine: 6.9h).
The month with the least sunshine is July (Average sunshine: 3.9h).

Average UV index in May - Seoul, South Korea
  • Average UV index in May: 8

The month with the highest UV index is July (UV index 10).
Months with the lowest UV index are January and December (UV index 2).