**Trader sentiment for the August 22 maximum temperature in Seoul/Incheon reflects tight clustering around 29–30°C because official short-range guidance from the Korea Meteorological Administration (KMA) and ensemble models currently favor a peak near 30–31°C under partly cloudy, showery conditions.** As of the latest KMA outlook, the 22nd is expected to bring morning rain (60% probability) transitioning to afternoon cloud cover (30% probability), with a forecast high of 31°C and low of 24°C. Complementary guidance from timeanddate.com and AccuWeather aligns closely, projecting highs of approximately 30–31°C (87°F) amid early thunderstorms and overcast skies. Key differentiating factors include the strength and timing of monsoon-related moisture, which enhances cloud cover and reduces incoming solar radiation while promoting localized evaporative cooling; coastal marine influence at Incheon that can moderate extremes relative to inland Seoul; and the seasonal late-August decline in insolation that caps daytime heating even without widespread rain. Recent model runs show limited spread in the 28–31°C range, producing the observed market balance between 29°C (27.0%) and 30°C (28.5%), with lower probabilities assigned to clearer, hotter scenarios (31°C at 10.5%) or more suppressed outcomes. Updated KMA and global model runs over the next 48 hours will be the primary drivers of any near-term shifts in these implied probabilities.