Korea Meteorological Administration (KMA) observational data from Seoul's primary weather station confirms the lowest temperature on May 5, 2026, hit exactly 8°C in early morning hours (around 0600 KST), under clear skies, light southerly winds, and lingering effects of a cold wave advisory issued after May 4; this aligns with high-resolution forecast model consensus from the prior 24 hours, which projected minima of 8–9°C amid radiative cooling in a stable high-pressure system. Trader consensus reflects near-certainty as the daily resolution window closes with no conflicting station readings. Realistic challenges include improbable instrument recalibration or disputes over the exact minimum timestamp, though KMA data carries authoritative weight per market criteria.