Record tropical nights and soaring temps push South Korea into extreme heat

July 2024 set a new benchmark for nighttime heat in South Korea, with an average of 9.7 tropical nights – the most ever logged. A tropical night occurs when minimum temperatures stay at or above 25°C, indicating that relief from daytime heat is scarce.

The KMA’s data show that the country’s average July temperature of 26.8°C trails only the 1994 and 2023 records of 27.7°C and 27.1°C respectively. The prolonged warmth prompted the meteorological service to issue its strongest heat‑wave warning for Seoul and surrounding regions, covering 43% of the Greater Seoul area.

Public health officials have highlighted the link between the extended heat and a surge in hospital admissions, urging people to avoid unnecessary outdoor activity during peak afternoon hours.