**Trader consensus strongly favors under 75 mm total precipitation for Seoul in September 2026, reflecting limited rainfall observed through mid-month and a prevailing dry atmospheric pattern.** September climatology for the region typically delivers 140–180 mm as the East Asian monsoon wanes and occasional typhoon or frontal systems contribute, yet current conditions show suppressed moisture transport and stable high-pressure influence limiting convective activity. Official short-term guidance from regional models indicates mostly dry to partly cloudy skies over the next 10–14 days, with only isolated light showers possible and negligible accumulation expected. With roughly 20 days remaining, the absence of significant rain-bearing systems—such as a late-season tropical cyclone or persistent low-level moisture—supports the market-implied probability of a below-normal total. Key upcoming data points include updated Korea Meteorological Administration monthly outlooks and ensemble precipitation forecasts that could refine the remaining accumulation risk.