**Trader consensus centers on 26–28°C as the most likely maximum for Busan on July 3, reflecting ensemble forecasts from models that place the city under the influence of the North Pacific high with a nearby monsoon front.** Coastal sea breezes and typical early-July humidity are expected to cap daytime peaks near or slightly above the long-term average high of ~27–28°C, while any organized rain would further suppress the maximum. Recent guidance shows no strong heatwave signal for the date, keeping probabilities for 29°C+ low and supporting the market’s tight clustering around the mid-to-upper 20s. Updated short-range runs from the Korea Meteorological Administration and global models in the coming 48 hours will be the key catalysts for any shifts in implied odds.