Traders see the tight clustering around 27–30°C for Seoul’s July 18 high temperature as reflecting typical midsummer monsoon conditions and model consensus from the Korea Meteorological Administration. Persistent humidity and frequent cloud cover or showers limit daytime heating, keeping most forecasts near the long-term July average of roughly 30°C while preventing extremes above 31°C. Recent model runs show only modest day-to-day variability tied to the timing of rain bands, which explains why no single outcome exceeds 24% implied probability. Updated short-range guidance expected in the next 24–48 hours will likely narrow the range as land-sea breeze and precipitation timing become clearer.