December weather forecast and climate
Incheon, South Korea

What is the temperature in December in Incheon?

In Incheon, South Korea, in December, the average high-temperature is 4.7°C (40.5°F), and the average low-temperature is -2.6°C (27.3°F).

How many days does it rain in December in Incheon?

In Incheon, in December, it is raining for 7.3 days, with typically 19.3mm (0.8") of accumulated precipitation.

How cold is the water in December in Incheon?

In December, in Incheon, the average sea temperature is 8.8°C (47.8°F). Swimming in 8.8°C (47.8°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.
Average temperature in December - Incheon, South Korea
  • Average high temperature in December: 4.7°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 December: -2.6°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 December - Incheon, South Korea
  • Average humidity in December: 62%

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 December - Incheon, South Korea
  • Average rainfall in December: 19.3mm

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

Average rainfall days in December - Incheon, South Korea
  • Average rainfall days in December: 7.3 days

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

Average sea temperature in December - Incheon, South Korea
  • Average sea temperature in December: 8.8°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 December / Average sunshine in December - Incheon, South Korea
  • Average daylight in December: 9.6h

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.6h).

  • Average sunshine in December: 5.5h

The month with most sunshine is May (Average sunshine: 7.5h).
The month with least sunshine is July (Average sunshine: 5.1h).

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