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Why does Seoul receive much of its rainfall during the summer?
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Seoul
Changgyeong Palace, with downtown Seoul in the background.
Seoul receives the majority of its annual rainfall during the summer primarily due to the influence of the northeast Asian monsoons. These seasonal winds establish precipitation patterns that result in up to three-fifths of the country's total annual rainfall occurring between June and August.1
This period is characterized by a hot, humid summer climate, which contrasts sharply with the relatively dry winter conditions experienced in the region. Additionally, while the summer monsoon is the primary driver of this seasonal concentration, late-summer tropical cyclones can occasionally contribute to heavy showers and storms, further impacting the city's precipitation totals.12