Recent ensemble forecasts from global models show a tight cluster around 31–33°C for Chengdu’s August 21 maximum, reflecting the market’s near-even split between 32°C and 33°C. The Sichuan basin’s high humidity, light steering winds, and scattered afternoon convection are limiting daytime warming despite seasonal solar input, while subtle differences in cloud cover timing across model runs create the narrow spread traders are pricing. Climatologically, late-August highs average near 30–32°C amid the East Asian monsoon transition, with any clearer skies or drier boundary-layer air capable of pushing readings to 33°C. Updated short-range guidance and official China Meteorological Administration bulletins expected over the next 48 hours will likely resolve the remaining uncertainty before resolution.