Seoul weather in January
January in Seoul: freezing, dry — one of the weakest months to visit.
#12 of 12 months in Seoul · #487 of 604 destinations to visit in January · comfort 49/100 (tier F)
Updated June 2026 · climate normals from ERA5 reanalysis
Seoul climate normals — January
| Daytime high | 3°C / 37°F | 🥶 freezing |
|---|---|---|
| Nighttime low | -6°C / 21°F | |
| Feels like (high) | -2°C / 28°F | |
| Rainfall | 27 mm / 1.1 in | ☀️ dry |
| Rainy days | 3 days | |
| Humidity | 57% | 🍃 comfortable |
| Dew point | -11°C / 13°F | |
| Sunshine | 7.7 h/day | |
| Daylight | 9.9 h | |
| Wind | 15 km/h / 9 mph | |
| Snowfall | 5.9 cm / 2.3 in | |
| Air quality (US AQI) | 92 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Seoul in January — FAQ
- Is January a good time to visit Seoul?
- January in Seoul: freezing, dry — one of the weakest months to visit. It ranks #12 of 12 months for Seoul on SeasonMap's comfort score (49/100).
- What is the weather like in Seoul in January?
- In January, Seoul averages a daily high of 2.7°C and a low of -5.9°C, with about 27.3 mm of rain over roughly 3.4 rainy days.
- What is the air quality in Seoul in January?
- Seoul has a mean US Air Quality Index of about 92 in January.
- Does it snow in Seoul in January?
- Seoul sees roughly 5.9 cm of snowfall in January.