Short-term forecasts from regional models point to overcast skies and scattered showers or thundershowers over Busan on July 4, driven by lingering monsoon moisture and a coastal sea-breeze regime that caps afternoon heating. These conditions favor peak temperatures clustered around 26–28 °C, where subtle differences in cloud timing, boundary-layer moisture, and local wind convergence determine whether the daily maximum reaches the upper or lower end of that narrow range. Historical July averages near 29 °C provide context, yet the current pattern’s suppressed insolation and evaporative cooling from precipitation keep trader consensus tightly focused on the mid-20s outcomes. Final Korea Meteorological Administration updates and morning model runs before resolution remain the key variables.