Cool
Average highs are around 20°C, so pack for cooler days.
Weather Guide
Seoul, South Korea Average Monthly Weather
Weather score43Mixed annual avg
Best months: September, June, August
Across the year, average daytime temperatures are around 17°C, sunshine averages 6.4h per day, and rainfall totals about 1343mm. Sea temperatures average 13°C across the year.
Annual weather
Annual averages
Temp
17°C
Rain
1343mm
Annual total
Sun
6.4h
Sea
13°C
Weather score
43
Mixed avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 49mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 6.6h per day, enough for a balanced month.
Cool sea
Sea temperatures average 20°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
October20°C average high
October is close to Seoul's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
Rain
October49mm average rain
October 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
October6.6 hours average sun
October sits close to Seoul's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsApril to June
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
October20°C average sea
October sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJuly to October
Sea temperatures are usually near 20°C in this stretch, so swimming comfort is at its strongest.
Weather score
October48 weather score
October sits close to Seoul's yearly weather-score average, giving a typical overall read on the month.
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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JW Marriott Dongdaemun Square SeoulSeoul, South Korea
JW Marriott Hotel SeoulSeoul, South Korea
Josun Palace, a Luxury Collection Hotel, Seoul GangnamSeoul, South Korea
L’Escape, a Luxury Collection Hotel, Seoul MyeongdongSeoul, South Korea
The Westin Josun SeoulSeoul, South Korea
The Westin Seoul ParnasSeoul, South Korea