Trader sentiment for Seoul's August precipitation clusters tightly around 150–300 mm because the East Asian summer monsoon has largely retreated, leaving convective instability and scattered showers rather than widespread monsoon deluges, while the second half of the month shows model consensus for drier conditions under building high pressure. With roughly half the month elapsed, accumulated totals through mid-August already constrain outcomes, and Korea Meteorological Administration forecasts indicate only modest additional rainfall (typically 50–150 mm) from remaining thunderstorms or weak frontal passages. Differentiation among the narrow 50 mm bins hinges on whether late-August atmospheric instability triggers frequent localized downpours—common in humid, 30–33 °C conditions—or yields mostly clear skies, as suggested by recent guidance. Historical August averages of 288–348 mm provide context, yet year-to-year variability from typhoon tracks and monsoon timing keeps implied probabilities evenly distributed across these central brackets.