Gangneung, South Korea, recorded its first tropical night of the year 19 days earlier than the previous year [1].
This early onset of extreme nighttime heat occurs just before the official start of summer, signaling an unusual shift in seasonal weather patterns for the Gangwon Province region.
A tropical night is defined by nighttime minimum temperatures that do not fall below 25°C [1]. This specific event marks the third-earliest tropical night ever recorded in the history of observations for the coastal city [1].
Meteorologists attribute the temperature spike to persistent westerly winds. Seo Eun-jin, a forecast analyst at the Korea Meteorological Administration, said these winds crossed the Taebaek Mountains and became hot and dry, which prevented nighttime temperatures from dropping [2].
Local residents experienced the heat during early June 2024, a day before the typical beginning of the summer season [2]. The rapid arrival of such conditions suggests a volatile atmospheric transition as the region moves toward the summer months.
An anchor for YTN News said the seasonal clock appears to be moving forward by more than a month [2]. The combination of geographic factors—specifically the interaction between the westerly winds and the mountain range—created a localized heat trap in Gangneung.
“The first ‘tropical night’ of the year was recorded 19 days earlier than the previous year.”
The occurrence of a record-breaking tropical night before the official start of summer indicates a significant deviation from historical climate norms in South Korea. When nighttime temperatures fail to drop, it increases heat stress on the human body and local ecosystems, potentially leading to higher energy demands for cooling and increased public health risks earlier in the calendar year.
