January weather forecast and climate
Seoul, South Korea

The Dongdaemun Gate in Seoul city, South Korea
The Dongdaemun Gate in Seoul city, South Korea
January, the same as December, is another cold winter month in Seoul, South Korea, with average temperature ranging between min -5.9°C (21.4°F) and max 1.5°C (34.7°F).

Temperature

The coldest month is January, with an average high-temperature of 1.5°C (34.7°F) and an average low-temperature of -5.9°C (21.4°F).

Humidity

In Seoul, South Korea, the average relative humidity in January is 59.8%.

Rainfall

January is the month with the least rainfall in Seoul, South Korea. Rain falls for 6.5 days and accumulates 20.8mm (0.82") of precipitation.

Daylight

In January, the average length of the day in Seoul is 9.9h.

Sunshine

In January, the average sunshine is 5.2h.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from the exposure to the Sun's UV radiation for the ordinary person.
Note: In January, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the coldest month in Seoul?

The coldest month in Seoul, South Korea, is January, with an average high-temperature of 1.5°C (34.7°F) and an average low-temperature of -5.9°C (21.4°F).

What is the temperature in January in Seoul?

In January, in Seoul, South Korea, the average high-temperature is 1.5°C (34.7°F), and the average low-temperature is -5.9°C (21.4°F).

What is the average humidity in January in Seoul?

In January, the average relative humidity in Seoul is 59.8%.

How much does it rain in Seoul in January?

In Seoul, in January, it is raining for 6.5 days, with typically 20.8mm (0.82") of accumulated precipitation.

What is the driest month in Seoul?

The month with the least rainfall in Seoul is January when the rain falls for 6.5 days and typically collects 20.8mm (0.82") of precipitation.

How many hours of daylight does Seoul have in January?

In Seoul, the average length of the day in January is 9.9h.

How many hours of sunshine does Seoul have in January?

In January, the average sunshine is 5.2h.

When is the lowest UV index in Seoul?

Months with the lowest UV index in Seoul are January and December, with an average maximum UV index of 2.

How high is the UV index in January in Seoul?

In Seoul, South Korea, the average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in January - Seoul, South Korea
  • Average high temperature in January: 1.5°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 January: -5.9°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 January - Seoul, South Korea
  • Average humidity in January: 59.8%

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 January - Seoul, South Korea
  • Average rainfall in January: 20.8mm

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 January - Seoul, South Korea
  • Average rainfall days in January: 6.5 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 January / Average sunshine in January - Seoul, South Korea
  • Average daylight in January: 9.9h

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 January: 5.2h

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 January - Seoul, South Korea
  • Average UV index in January: 2

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).