Verdict: Tough month
Seoul Weather in January
January is properly cold in Seoul, with highs of only 2°C (36°F). Rain is occasional — about 4 wet days in a typical year. If your dates are flexible, most travelers will have a better time in Seoul outside January.
Average high
2°C / 36°F
Average low
-7°C / 19°F
Rain days
~4
Precipitation
28 mm
What to pack for Seoul in January
- Full winter kit — insulated coat, gloves, warm hat
- Comfortable walking shoes — every guide on this site assumes you'll use them
January against the rest of the year
Warmest in Seoul: Jul (29°C / 84°F) · Coolest: Jan (2°C / 36°F) · Wettest: Jul (~20 rain days)
2°
-7°
Jan
6°
-4°
Feb
12°
0°
Mar
18°
7°
Apr
22°
12°
May
27°
18°
Jun
29°
22°
Jul
29°
23°
Aug
26°
18°
Sep
18°
9°
Oct
12°
2°
Nov
3°
-6°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)