Seoul weather in December
December in Seoul: freezing, dry — a fair time to visit.
#11 of 12 months in Seoul · #488 of 604 destinations to visit in December · comfort 50/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Seoul climate normals — December
| Daytime high | 3°C / 38°F | 🥶 freezing |
|---|---|---|
| Nighttime low | -5°C / 23°F | |
| Feels like (high) | -1°C / 30°F | |
| Rainfall | 26 mm / 1 in | ☀️ dry |
| Rainy days | 5 days | |
| Humidity | 63% | 💧 humid |
| Dew point | -8°C / 17°F | |
| Sunshine | 7.2 h/day | |
| Daylight | 9.6 h | |
| Wind | 15 km/h / 9 mph | |
| Snowfall | 8.5 cm / 3.3 in | |
| Air quality (US AQI) | 77 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Seoul in December — FAQ
- Is December a good time to visit Seoul?
- December in Seoul: freezing, dry — a fair time to visit. It ranks #11 of 12 months for Seoul on SeasonMap's comfort score (50/100).
- What is the weather like in Seoul in December?
- In December, Seoul averages a daily high of 3.2°C and a low of -4.9°C, with about 25.5 mm of rain over roughly 5.2 rainy days.
- What is the air quality in Seoul in December?
- Seoul has a mean US Air Quality Index of about 77 in December.
- Does it snow in Seoul in December?
- Seoul sees roughly 8.5 cm of snowfall in December.