Cool
Average highs are around 4°C, so pack for cooler days.
December verdict
Seoul, South Korea in December
Weather score32Poor
Poor for holiday weather
Average highs are around 4°C, so pack for cooler days. Sunshine averages 5h per day, enough for a balanced month. Rainfall averages 21mm, which is relatively low for holiday planning.
December weather
Monthly averages
Temp
4°C
Rain
21mm
Sun
5h
Sea
9°C
Weather score
32
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 21mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 5h per day, enough for a balanced month.
Cool sea
Sea temperatures average 9°C, so the water can feel cool.
Map
Weather map
Compare Seoul, South Korea with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December4°C average high
December has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
Rain
December21mm average rain
December is one of Seoul's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJanuary to June and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December5 hours average sun
December is one of Seoul's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsApril to June
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December9°C average sea
December is below Seoul's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to October
Sea temperatures are usually near 20°C in this stretch, so swimming comfort is at its strongest.
Weather score
December32 weather score
December is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJune and September
These months have the strongest weather score in the monthly averages.
Hotels in Seoul, South Korea
Marriott
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