Climate · Seoul

Seoul in January

Cold and mostly dry, as the days lengthen.

Typical weather, averaged over 30 years

January in Seoul is cold: highs near 38°F, lows near 19°F. Rain or snow falls on about one day a week, and the days lengthen by 25 minutes from the first week to the last.January in Seoul is cold: highs near 3°C, lows near -7°C. Rain or snow falls on about one day a week, and the days lengthen by 25 minutes from the first week to the last.

High
38°F3°Caverage
Low
19°F-7°Caverage
Wet days
1a week · 14% of days
Daylight
9h 53mon average

Is January a good time to visit Seoul?


January sits outside Seoul's best months, which run in two parts: May, or September to October. Expect cold days and rain or snow on about one day a week.

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How January sits in the year

week by week

Temperature

Highs near 38°F in January, against 38°F to 87°F through the year.Highs near 3°C in January, against 3°C to 31°C through the year.

Chance of a wet day

14% of days in January, against 14% to 58% through the year.

Cloud cover

37% cover in January, against 36% to 56% through the year.

Daylight

9h 53m in January, against 9h 37m to 14h 43m through the year.

Week by week, lightly smoothed, with January shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side


  1. December41°5°low 23°low -5°1 wet day a weekRain on about one day a week.
  2. January38°3°low 19°low -7°1 wet day a weekRain on about one day a week.
  3. February42°6°low 22°low -6°1 wet day a weekRain on about one day a week.

Where Seoul sits, in January

Asia/Seoul

this place
typical high in January 40°F4°C95°F35°C
Sunrise, mid-January
7:46 AMsets 5:36 PM
Above the sea
30 mlow-lying
Latitude
37.6°Nnorthern hemisphere
Nearest of ours
Busan325 km south-east

The land around Seoul, shaded by its typical high in January, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in South Korea in January

high · low · wet days

  • Jeju49°9° · 39°4° 3
  • Busan47°8° · 32°0° 1

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Seoul. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (30 m) against the climate model's (83 m).Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (30 m) against the climate model's (83 m). Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.