Seoul weather in April
In April, Seoul has an average high of 15 °C60 °F and an average low of 5 °C40 °F, with about 72 mm2.8 in of precipitation. It is the 7th warmest month of the year and ranks 6th for precipitation.
How April compares with other months
Compared with March, April is 6.1 °C11 °F warmer on average and wetter by 35 mm1.4 in. Compared with May, April is 6.1 °C10.9 °F cooler on average and drier by 12 mm0.5 in. Daylight lasts about 13.1 hours around the middle of the month. Average relative humidity is 74% and the average cloud amount 53%.
Is April a good time to visit Seoul?
April is not among the most comfortable months by our comfort score: it is cool (average high 15 °C60 °F), nights are cold (average low 5 °C40 °F) and it is fairly wet (72 mm2.8 in). The most comfortable months in Seoul are May and October.
What to wear in April
For Seoul in April, pack long sleeves, a sweater and a medium jacket and an extra layer for the cooler mornings and evenings.
April in nearby places
Other months in Seoul
- January1 °C33 °F / −7 °C20 °F
- February3 °C38 °F / −5 °C23 °F
- March9 °C48 °F / −1 °C30 °F
- April15 °C60 °F / 5 °C40 °F
- May21 °C70 °F / 11 °C52 °F
- June26 °C78 °F / 17 °C62 °F
- July28 °C82 °F / 21 °C70 °F
- August28 °C83 °F / 22 °C71 °F
- September25 °C76 °F / 17 °C62 °F
- October19 °C65 °F / 10 °C49 °F
- November11 °C51 °F / 3 °C37 °F
- December3 °C37 °F / −4 °C24 °F
Frequently asked questions
How warm is Seoul in April?
In April the average high in Seoul is 15 °C (60 °F) and the average low is 5 °C (40 °F).
Does it rain a lot in Seoul in April?
On average about 72 mm (2.8 in) of precipitation falls in April; it ranks 6th of the 12 months.
Is April the warmest month in Seoul?
No. The warmest month in Seoul is August, with an average high of 28 °C (83 °F). The coldest month is January, with an average low of -7 °C (20 °F).
How long is the day in Seoul in April?
In the middle of April the day in Seoul lasts about 13.1 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Seoul in April?
The average relative humidity in April is about 74%. This is a long-term average for the whole day.
How cloudy is Seoul in April?
On average about 53% of the sky is covered by cloud in April. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.