Seoul Weather in January
In January, Seoul averages a high of 2°C (35°F) and a low of -6°C (21°F), from 48 years of daily records (1971–2026).
2°C
Average high
35°F
-6°C
Average low
21°F
13°C
Record high
56°F · January 15, 2002
-19°C
Record low
-2°F · January 5, 1986
What January Is Like in Seoul
- The coldest January reading, -19°C (-2°F) on January 5, 1986, has not been matched in 40 years.
- January is Seoul's coldest month of the year.
- January is Seoul's driest month, averaging 19 mm of rain against 362 mm in the wettest.
- The warmest January in the record was 1979; the coldest was 2011.
At least 1 mm of rain falls on 18% of January days, and the month averages 19 mm in total.
Warmest: 1979 (5.3°C)Latest: 2026 (-0.2°C)10-year averageLong-run average (1.6°C)
Look Up a Day in January
See the weather in Seoul on any January date, year by year.
Source: NOAA GHCN-Daily, Seoul City (1973–2025); Incheon (1971–2026). Averages cover 1971–2026. How we compute this