The Korea Meteorological Administration's latest medium-range forecast projects Busan’s highest temperature on April 9 at 15°C, with a 60% precipitation probability under partly cloudy conditions, driving trader consensus toward the mid-teens amid a cool, rainy pattern persisting over the past week from northerly cold air advection. The slight edge for 14°C at 55% market-implied odds over adjacent bins reflects ensemble model spread, where increased cloud cover and sea breezes could suppress peaks by 1–2°C, while brief clearing might push toward 15–16°C—historical early April averages sit near 15°C but vary with frontal passages. Key differentiators include southerly wind strength and urban heat island effects at Gimhae Airport station; updated short-range guidance expected April 7–8 will refine these uncertainties.