Cool
Average highs are around 17°C, so pack for cooler days.
April verdict
Poor for holiday weather
Average highs are around 17°C, so pack for cooler days. Sunshine averages 7.2h per day, enough for a balanced month. Rainfall averages 104mm, so some wet days are possible.

Monthly averages
Temp
17°C
Rain
104mm
Sun
7.2h
Sea
9°C
Weather score
35
Poor
Cool
Average highs are around 17°C, so pack for cooler days.
Showers
Rainfall averages 104mm, so some wet days are possible.
Some sun
Sunshine averages 7.2h per day, enough for a balanced month.
Cool sea
Sea temperatures average 9°C, so the water can feel cool.
Map
Compare South Korea with nearby places by weather score, rain, sun, temperature, and swim conditions.
April17°C average high
April is close to South Korea's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
April104mm average rain
April sits on the drier side of South Korea's year, which helps with sightseeing and transfers.
Driest monthsJanuary to May and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
April7.2 hours average sun
April is brighter than South Korea's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsApril to May
This stretch has the strongest sunshine in the monthly averages.
April9°C average sea
April is below South Korea's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to September
Sea temperatures are usually near 18°C in this stretch, so swimming comfort is at its strongest.
April35 weather score
April 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.