**Trader sentiment for Busan’s August 9 maximum temperature centers on the 31–32°C range because ensemble forecasts from the Korea Meteorological Administration and global models show daytime highs stabilizing near 30–31°C under persistent North Pacific High influence.** Warm, humid southerly flow along the high’s western flank has produced above-average temperatures across the Korean Peninsula in early August, with limited diurnal cooling due to elevated dew points and minimal cloud cover expected on the 9th. Coastal sea breezes typical of Busan may cap peaks slightly below inland values, creating the tight spread between the leading 32°C (34.5%) and 31°C (29.0%) outcomes. Minor model differences in timing of any weak frontal passage or afternoon convection introduce the modest probability mass on 30°C and 33°C. Updated short-range guidance issued over the next 48 hours will be the key catalyst for further market movement.