January weather - Winter 2024 - Seoul, South Korea

Weather in January
Frequently asked questions
Average temperature in January
Average humidity in January
Average rainfall in January
Average rainfall days in January
Average daylight in January
Average sunshine in January
Average UV index in January

The Dongdaemun Gate in Seoul city, South Korea

Weather in January

January in Seoul, South Korea is predominantly dry and consists of long, cold nights with low temperatures descending to -5.9°C (21.4°F). Frozen snowflakes frequently decorate the scenic landscapes, creating a wintry atmosphere. This makes it a perfect time for winter sports enthusiasts. As daylight hours are at their minimum, the crisp air often accompanied by magical sunrise and sunset views along the Han River. Transitioning into February, the weather stays fairly unchanged.

Temperature

In Seoul, South Korea, the month of January is known for its lowest average temperatures, reaching a high of 1.5°C (34.7°F) and a low of -5.9°C (21.4°F).

Humidity

The average relative humidity in January in Seoul is 59.8%.

Rainfall

January is the month with the least rainfall. Rain falls for 6.5 days and accumulates 21mm (0.83") of precipitation.

Daylight

In January, the average length of the day in Seoul is 9h and 55min.
On the first day of the month, sunrise is at 07:46 and sunset at 17:23. On the last day of January, in Seoul, South Korea, sunrise is at 07:37 and sunset at 17:53 KST.

Sunshine

In Seoul, the average sunshine in January is 5.2h.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index in Seoul. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.
Note: In January, the UV index of 2 transforms into the following advice:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.

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Frequently asked questions

What is the coldest time of year in Seoul?

January, recording an average high temperature of 1.5°C (34.7°F) and a low temperature of -5.9°C (21.4°F), is Seoul's coldest month.

How cold is January in Seoul?

The average high-temperature, in January, in Seoul, is 1.5°C (34.7°F), while 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, South Korea, is 59.8%.

What is the driest month in Seoul?

January is the month with the least rainfall. Rain falls for 6.5 days and accumulates 21mm (0.83") of precipitation.

How much does it rain in Seoul in January?

In January, the rain falls for 6.5 days. Throughout January, 21mm (0.83") of precipitation is accumulated.

How many hours of daylight does Seoul have in January?

The average day length in January in Seoul is 9h and 55min.

When are sunrise and sunset in January in Seoul?

On the first day of January, sunrise is at 07:46 and sunset at 17:23. On the last day of the month, sunrise is at 07:37 and sunset at 17:53 KST.

How many hours of sunshine does Seoul have in January?

The average sunshine duration in January in Seoul is 5.2h.

When is the lowest UV index in Seoul?

The months with the lowest UV index are January and December, with an average maximum UV index of 2.

How high is the UV index in January in Seoul?

In January, the average daily maximum UV index in Seoul is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year January F M A M J J A S O N D

Dec

January

Feb

Average high temperature

4.3°C 39.7°F

1.5°C 34.7°F

4.7°C 40.5°F

Average low temperature

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average UV index

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).

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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%).

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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).

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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).

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Average daylight in January /
Average sunshine in January
Seoul, South Korea

Average daylight in January: 9h and 5min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

Average sunshine in January: 5h and 1min

The month with the most sunshine is May (Average sunshine: 6h and 54min).
The month with the least sunshine is July (Average sunshine: 3h and 54min).

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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).
The months with the lowest UV index are January and December (UV index 2).

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January weather forecast
Seoul, South Korea

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