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 7.4h per day, enough for a balanced month. Rainfall averages 102mm, so some wet days are possible.

Monthly averages
Temp
17°C
Rain
102mm
Sun
7.4h
Sea
8°C
Weather score
35
Poor
Cool
Average highs are around 17°C, so pack for cooler days.
Showers
Rainfall averages 102mm, so some wet days are possible.
Some sun
Sunshine averages 7.4h per day, enough for a balanced month.
Cool sea
Sea temperatures average 8°C, so the water can feel cool.
Map
Compare Seoul, South Korea with nearby places by weather score, rain, sun, temperature, and swim conditions.
April17°C average high
April 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.
April102mm average rain
April sits on the drier side of Seoul's year, which helps with sightseeing and transfers.
Driest monthsJanuary to June and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
April7.4 hours average sun
April is brighter than Seoul's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsApril to June
This stretch has the strongest sunshine in the monthly averages.
April8°C average sea
April 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.
April35 weather score
April scores below Seoul's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJune and September
These months have the strongest weather score in the monthly averages.
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