Current forecasts from the Korea Meteorological Administration and global models indicate Seoul’s overnight low stabilizing near 16°C on June 9 under clear to partly cloudy skies and light winds, consistent with early-June climatological averages of 14–17°C. This strong model consensus and absence of cold-air advection or heavy precipitation underpin the near-certain market-implied probability for 16°C as the day’s minimum, recorded at official stations between 3 a.m. and 9 a.m. local time. A realistic shift to lower values would require an unforecasted northerly surge or enhanced radiational cooling from unexpected cloud changes, both low-probability outcomes given the latest guidance.