You arrive in Jongno just before lunch. The palace roofs glow in strong sun, the market lanes smell of mung bean pancakes, and by evening the heat has softened enough for a slow walk beside the Cheonggyecheon. That is the best rhythm for Seoul in early summer: history before the hottest hours, food when the city feels busiest, and water and lights after dark. What early summer in Seoul actually feels like Plan around heat, not distance Early summer usually means late May through June. Seoul can feel bright and comfortable in the morning, then hot and humid between noon…