Recent forecast guidance from the Korea Meteorological Administration and ensemble models points to a daytime maximum near 22°C in Busan on May 22, with lingering uncertainty between 21°C and 23°C driven by variable sea-breeze moderation and partial cloud cover along the southeastern coast. Mid-May climatology in this region typically features highs of 20–23°C when southerly flow dominates, but localized marine influences and timing of any showers can suppress or allow brief warming spikes. The closely matched market-implied odds on 22°C and 23°C reflect this narrow spread in model outputs ahead of final observational data, with traders weighing potential afternoon clearing against persistent onshore winds that often cap temperatures at the lower end of the forecast range.