January weather forecast
Incheon, South Korea

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Weather in January

Incheon enters the year with chilly weather, a feature of winter season in this South Korean coastal city. January's temperatures range from -5.4°C (22.3°F) to 1.7°C (35.1°F), making it the coldest month of the year. Activity remains indoors as frostbite fiercely grapples with the residents. Rarely the sky opens up as rainfall is at its yearly low. Regardless of the cold, January also sees longer sunny hours compared to later months.

Temperature

In Incheon, the lowest temperatures are generally noted in January, averaging a high of 1.7°C (35.1°F) and a low of -5.4°C (22.3°F).

Humidity

With an average relative humidity of 61.5%, January is the least humid month.

Rainfall

In January, in Incheon, the rain falls for 6.6 days. Throughout January, 21mm (0.83") of precipitation is accumulated. Throughout the year, there are 101.9 rainfall days, and 1235mm (48.62") of precipitation is accumulated.

Sea temperature

In Incheon, in January, the average water temperature is 5°C (41°F).
Note: Swimming in 5°C (41°F) poses a severe threat. Even short exposure to 13°C (55.4°F) is chilling, and going below 10°C (50°F) can cause breathing irregularities and intense cold shock, based on one's stamina.

Daylight

The average length of the day in January in Incheon is 9h and 55min.
On the first day of January, sunrise is at 07:47 and sunset at 17:25. On the last day of the month, sunrise is at 07:37 and sunset at 17:55 KST.

Sunshine

In January, the average sunshine is 5.7h.

Frequently asked questions

What is the coldest time of year in Incheon?

January is the month that records the lowest temperatures, with averages ranging from a high of 1.7°C (35.1°F) to a low of -5.4°C (22.3°F).

How cold is January?

In Incheon, 1.7°C (35.1°F) is the average high-temperature and -5.4°C (22.3°F) is the average low-temperature during January.

What is the least humid month?

With an average relative humidity of 61.5%, January is the least humid month.

What is the average humidity in January?

In January, the average relative humidity is 61.5%.

How many days does it rain in January?

In January, the rain falls for 6.6 days. Throughout January, 21mm (0.83") of precipitation is accumulated.

What is the water temperature in January?

In Incheon, the average seawater temperature in January is 5°C (41°F). Swimming in 5°C (41°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the average length of the day in January?

In January, the average day length is 9h and 55min.

When are sunrise and sunset in January?

In January, on the first day of the month, sunrise is at 07:47 and sunset at 17:25. On the last day of the month, sunrise is at 07:37 and sunset at 17:55 KST.

How long on average sun shines in January?

The average sunshine duration in January is 5.7h.

Average temperature in January
Incheon, South Korea

Average temperature in January - Incheon, South Korea
  • Average high temperature in January: 1.7°C

The warmest month (with the highest average high temperature) is August (29°C).
The month with the lowest average high temperature is January (1.7°C).

  • Average low temperature in January: -5.4°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 (-5.4°C).

Average humidity in January
Incheon, South Korea

Average humidity in January - Incheon, South Korea
  • Average humidity in January: 61.5%

The month with the highest relative humidity is July (82.2%).
The month with the lowest relative humidity is January (61.5%).

Average rainfall in January
Incheon, South Korea

Average rainfall in January - Incheon, South Korea
  • Average rainfall in January: 20.6mm

The wettest month (with the highest rainfall) is July (319.6mm).
The driest month (with the least rainfall) is December (19.3mm).

Average rainfall days in January
Incheon, South Korea

Average rainfall days in January - Incheon, South Korea
  • Average rainfall days in January: 6.6 days

The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is February (5.3 days).

Average sea temperature in January
Incheon, South Korea

Average sea temperature in January - Incheon, South Korea
  • Average sea temperature in January: 5°C

The best month for swimming (with the highest average sea temperature) is August (23.4°C).
The coldest month (with the lowest average sea temperature) is February (3.3°C).

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

Average daylight in January / Average sunshine in January - Incheon, 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 4min

The month with the most sunshine is May (Average sunshine: 7h and 30min).
The month with the least sunshine is July (Average sunshine: 5h and 6min).

Incheon, South Korea

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