Cool
Average highs are around 16°C, so pack for cooler days.
January verdict
Ulleungdo, South Korea in January
Weather score25Poor
Poor for holiday weather
Average highs are around 16°C, so pack for cooler days. Sunshine averages 0h per day, so this is not one of the brighter months. Rainfall averages 55mm, which is relatively low for holiday planning.
January weather
Monthly averages
Temp
16°C
Rain
55mm
Sun
0h
Sea
12°C
Weather score
25
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 55mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 0h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 12°C, so the water can feel cool.
Map
Weather map
Compare Ulleungdo, South Korea with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
January16°C average high
January has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsJuly to September
This stretch sets the upper range for average daytime heat.
Rain
January55mm average rain
January is one of Ulleungdo'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
January0 hours average sun
January is close to Ulleungdo's usual sunshine level, with limited seasonal swing across the year.
Brightest monthsAll year
Sunshine stays consistently strong through the year.
Sea temperature
January12°C average sea
January is one of the coolest sea months, so the water may feel fresher than in peak months.
Warmest seaJuly to September
Sea temperatures are usually near 22°C in this stretch, so swimming comfort is at its strongest.
Weather score
January25 weather score
January is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJune to September
These months have the strongest weather score in the monthly averages.