Climate in Seoul, South Korea

The graphs below show the monthly weather averages over the year.
* Data from weather station: Seoul, South Korea.

Average day and night temperature

The mean minimum and maximum temperatures over the year. Show in Fahrenheit

Monthly hours of sunshine

The average monthly total hours of sunshine over the year

Daily percent of sunshine

The mean percent of sunhours during the day over the year

Monthly precipitation

The mean monthly precipitation over the year, including rain, snow, hail etc. Show in Inches

Monthly rainy days

The average number of days each month with rain, snow, hail etc.

Average humidity

The mean monthly relative humidity over the year

Average wind speed

The mean monthly wind speed over the year (in meters per second)

Weather Forecasts for Seoul

SUN Oct 17
12°C | 2°C

Sunny

MON Oct 18
14°C | 6°C

Partly cloudy

TUE Oct 19
15°C | 8°C

Patchy rain possible

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.

Here are some average weather facts we collected from our historical climate data:

  • During the month of May and October you are most likely to experience good weather with pleasant average temperatures that fall between 20 degrees Celsius (68°F) and 25 degrees Celsius (77°F).
  • On average, the warmest month(s) are July and August.
  • The months of May, June and September have a high chance of precipitation.
  • The warmest month is August with an average maximum temperature of 30°C (86°F).
  • The coldest month is January with an average maximum temperature of 1°C (34°F).
  • July is the most wet month. This month should be avoided if you are not a big fan of rain.
  • December is the driest month.
  • May is the most sunny month.
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.