Traders assign near-certainty to a 27°C high in Chengdu on October 1 due to consistent late-September and early-October model runs from regional meteorological agencies showing peak afternoon temperatures reaching that threshold under partly cloudy to overcast conditions with light northeasterly flow. Current surface observations and short-range guidance align closely with this value, well above the seasonal average high near 23–24°C and without significant cool-air advection or precipitation to suppress readings. This market-implied outcome reflects aggregated real-time data rather than long-term projections. A realistic challenge would require an unexpected shift in steering patterns or rapid cloud buildup that caps temperatures 1–2°C lower at the official reporting station.