Avg high
23°C
Avg low
12°C
Rainfall
113 mm
Rain days
8.5
Sunshine
9.7 h/day
Daylight
14 h
What to pack for Seoul in May
- t-shirts and light layers
- a light jacket for evenings
- a packable rain layer
Humidity averages 69%; max daily wind around 19 km/h.
How May compares
Best months in Seoul: April–May & October. See the full best time to visit Seoul guide.
Seoul in May: the details
In May, Seoul sees average daytime highs of 23°C (73°F) and overnight lows of 12°C (53°F). Rainfall totals roughly 113 mm across 8.5 rainy days, and the sun shines about 9.7 hours per day with 14 hours of daylight mid-month. Relative humidity averages 69%.
These figures are climate normals computed from the ERA5 weather reanalysis (2019–2024) for Seoul, South Korea (37.57, 126.98) — see our methodology. Actual conditions vary year to year.
Where should you go next month?
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