Climate in Seoul (South Korea)

The best time of year to visit Seoul in South Korea

The large amount of people who live and work in Seoul at only 613 kilometers help to ensure that the average temperature in the city is a few degrees higher than in the countryside which surrounds the city. This is because the buildings and streets retain the heat, an effect that is especially noticeable during the summer evenings.

Seoul has relatively cool and sometimes quite mild winters. However not every winter is the same in Seoul. Some winters there will be no days below the freezing point and other years you can experience severe frost. That same unpredictability is reflected throughout almost the entire year. In the summer months, temperatures are mainly tempered by clouds and precipitation.

From May to September you will see the most rain, with rainfall amounts rising in July and August to 300 and sometimes more than 400 millimeters per month. In this period there is also the possibility that Seoul gets hit by a hurricane. The hurricane season runs from June to December in this region.

During the months of May and September you are most likely to experience good weather with pleasant average temperatures that fall between 20 degrees Celsius (68°F) and 26 degrees Celsius (79°F).

Other facts from our historical climate data:

When is summer in Seoul?
The hottest season / summer takes place in June, July, August and September.

Which months have the greatest rainfall in Seoul?
Most rainfall (rainy season) is seen in June, July and August.

Which is the warmest month in Seoul?
August has an average maximum temperature of 29°C (84°F) and is the warmest month of the year.

Which is the coldest month in Seoul?
The coldest month is January with an average maximum temperature of 1°C (33°F).

Which is the wettest month in Seoul?
July tops the wettest month list with 364mm (14.3in) of rainfall.

Which is the driest month in Seoul?
January is the driest month with 18mm (0.7in) of precipitation.

Which is the sunniest month in Seoul?
May is the sunniest month with an average of 225 hours of sunshine.

No idea where to travel to this year? We now have a tool which suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.