Seoul Weather in December: What to Expect
In December, Seoul averages highs of 3.2°C and lows of -5.2°C, with about 4 rainy days (~25 mm). Verdict: Cold — pack heavy — daytime highs average just 3.2°C. That makes it the coolest of South Korea's 6 main cities this month.
Seoul vs other South Korea cities in December
South Korea is not one climate. In December, Jeju runs to 9.8°C while Seoul sits at 3.2°C — a 7°C spread. Here is where Seoul falls:
What to pack for Seoul in December
With highs near 3.2°C and lows around -5.2°C, pack warm layers, a proper jacket, and closed shoes, a warm fleece or down layer for cold nights.
What to do in Seoul in December
December's weather suits sightseeing through the day. Top sights:
Public holidays in South Korea, December
- 2026-12-25 — Christmas Day
- 2027-12-25 — Christmas Day
Seoul in December — FAQs
What is the weather like in Seoul in December?
In December, Seoul averages daytime highs of 3.2°C and overnight lows around -5.2°C, with roughly 4 rainy days and about 25 mm of rain across the month. Cold — pack heavy — daytime highs average just 3.2°C.
Is December a good time to visit Seoul?
Cold — pack heavy. December is comfortable enough for full-day sightseeing in Seoul. Among South Korea's cities, Seoul is the coolest this month.
What should I pack for Seoul in December?
For December (-5.2–3.2°C), pack warm layers, a proper jacket, and closed shoes, a warm fleece or down layer for cold nights.
What is there to do in Seoul in December?
Seoul's main sights include Changdeokgung, Gyeongbokgung, Hwaseong Fortress, Namsan Seoul Tower. The weather suits visiting these comfortably through the day.
Are there public holidays in South Korea in December?
Yes — Christmas Day (2026-12-25), Christmas Day (2027-12-25). Sites can be busier or closed around these dates.
Seoul weather by month: