Average temperature in December is 0.3 °C
Average daytime temperature is 4.4 °C
Average night temperature is -3.6 °C
Absolute maximum temperature: 15.6 °C
Absolute minimum temperature: -14.1 °C
Number of sunny days: 16
Number of rainy days: 11
Number of snow days: 4
Precipitation sum: 78 mm
* Weather data for Incheon South Korea is based on climate observations for 2023 year
| December (°C) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperature | 1.2 | 6.8 | 3.2 | 7.1 | 10.2 | 10.5 | 10.8 | 15.6 | 15.1 | 13.8 | 10.3 | 7.7 | 10.7 | 7.7 | 5.6 | -2.3 | -6.3 | -3.6 | 0.8 | -5.2 | -7.5 | -7.4 | -2.3 | 1.1 | 2 | 6.1 | 6.2 | 4.3 | 4.6 | 4.6 | 5.5 |
| Apparent max temperature | -4.7 | 2.2 | -0.9 | 2.9 | 7.4 | 7.4 | 5.2 | 11.6 | 14.2 | 11 | 6.8 | 4.4 | 9.3 | 4 | 2 | -10.5 | -12.5 | -9.1 | -2.8 | -11.8 | -13.6 | -13.4 | -6.4 | -2.7 | -3.1 | 0.5 | 3.4 | 0 | 1.6 | 0.8 | 1.4 |
| Mean temperature | -2.7 | 1.3 | -1.7 | 2.4 | 4.9 | 5.1 | 6.9 | 11.5 | 9.2 | 10 | 6.2 | 2.5 | 8 | 6.6 | 3 | -8 | -9.1 | -6 | -3.6 | -9.6 | -11.5 | -10 | -4.7 | -2.4 | -1.1 | -0.7 | -0.6 | 0 | 0.3 | 1.6 | 0.2 |
| Apparent mean temperature | -9.5 | -8.8 | -8.5 | -4.9 | -1.7 | -6.2 | -2.7 | 4.1 | -0.8 | 0.6 | -2 | -4.4 | -2 | 0.1 | -9.6 | -18.1 | -17.1 | -13.6 | -14.6 | -20.1 | -20.3 | -19.8 | -12.9 | -8.7 | -8.7 | -9.7 | -7.5 | -6.6 | -6.4 | -4.1 | -7.4 |
| Minimum temperature | -4.9 | -4.8 | -4.6 | -0.9 | 2 | -1.8 | 1 | 8.6 | 3 | 4.5 | 3.1 | -1.1 | 1.3 | 4.9 | -2.4 | -12.2 | -11.3 | -8.6 | -8.3 | -13.8 | -14.1 | -13.4 | -8.5 | -5.1 | -4.9 | -5.8 | -3.8 | -3 | -2.9 | -0.4 | -3.4 |
| Apparent min temperature | -7.4 | -3.4 | -5.7 | -1.6 | 1.5 | 1.1 | 2.3 | 8.5 | 7 | 6.9 | 1.6 | -0.7 | 5.4 | 2.5 | -1.4 | -15 | -14.6 | -11.1 | -8.4 | -15.9 | -17.7 | -15.1 | -9 | -6.2 | -5.2 | -5 | -4 | -3.5 | -3 | -2.3 | -3.8 |
| December | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight duration (h) | 9.8 | 9.8 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.7 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 |
| Sunshine duration (h) | 8.2 | 6.2 | 8.8 | 8.8 | 6.6 | 0.7 | 8.7 | 8.7 | 8.7 | 7.8 | 0 | 3.3 | 4.1 | 0 | 0 | 6.3 | 8.6 | 7.2 | 2.4 | 8.6 | 8.6 | 8.6 | 8.6 | 8.6 | 4 | 8.6 | 8.6 | 8.6 | 5.1 | 0 | 4.4 |
| Precipitation (mm) | 0 | 0.2 | 0 | 0 | 0 | 3.9 | 0 | 0 | 0.2 | 2.7 | 14.6 | 0 | 1.5 | 30.7 | 5.7 | 0.1 | 0 | 0 | 0.3 | 0 | 0 | 0 | 0.9 | 1.2 | 0 | 0 | 0 | 0 | 0 | 15.5 | 0.1 |
| Precipitation hours | 0 | 2 | 0 | 0 | 0 | 6 | 0 | 0 | 2 | 8 | 17 | 0 | 4 | 24 | 11 | 1 | 0 | 0 | 2 | 0 | 0 | 0 | 8 | 7 | 0 | 0 | 0 | 0 | 0 | 21 | 1 |
| Wind speed (m/s) | 24.5 | 28.7 | 10.6 | 14.1 | 14.3 | 23.1 | 29.2 | 28 | 17.7 | 20.5 | 31.6 | 14.7 | 13.8 | 24 | 28.7 | 35.3 | 17.1 | 12.5 | 18.7 | 23.1 | 19.3 | 16.1 | 8.4 | 11.1 | 16.5 | 21.6 | 11.1 | 12 | 8.7 | 22.4 | 21.9 |
In December 2023, the highest daytime temperature in Incheon was 15.6°C.
While the minimum temperature at night dropped to -14.1°C.
The average nighttime and daytime temperatures during December in Incheon are -3.6°C and 4.4°C respectively.
The precipitation sum in December is about 78 mm.