Korea Meteorological Administration observations at Gimhae International Airport—Busan's official reference station—recorded a midday peak of 21°C under partly cloudy skies with light southerly winds and 30% precipitation probability, driving trader consensus to 99.9% implied probability for this outcome. Current late-afternoon readings hover at 19°C amid increasing cloud cover, past the typical peak heating window around 2–4 p.m., with forecast models showing consensus for no further intensification due to limited solar insolation and stable atmospheric conditions. April climatology in Busan averages highs of 18–20°C, contextualizing this mild day amid a warmer-than-normal 2026 spring pattern. A challenge would require unexpected clearing or downslope warming to push 22°C, but post-peak timing makes this improbable; final hourly data releases by evening will confirm resolution.