Recent forecasts from models informing KMA guidance point to a highest temperature in Busan on June 25 most likely between 23–26°C, with market-implied odds clustered tightly around 24–25°C reflecting this narrow range. Early summer conditions feature rising humidity ahead of the East Asian monsoon, with sea breezes from the Korea Strait and possible cloud cover or isolated showers limiting daytime heating and keeping maxima near seasonal normals of roughly 24–26°C. Minor shifts in forecast timing, solar insolation under variable skies, or localized wind patterns could differentiate outcomes within this band, as small changes in maximum sustained temperatures often hinge on afternoon convective development. Updated model runs and official briefings over the next 48 hours will provide the clearest resolution signals for traders.