Recent forecast models from Chinese meteorological sources and international ensembles indicate Beijing's September 20 low will likely fall between 16–21°C under partly cloudy to clearing conditions, with daytime highs near 28°C. Trader sentiment remains closely divided because global and regional models show modest divergence on overnight radiative cooling rates and weak frontal influences, keeping the 26°C-or-higher and 16°C-or-below buckets nearly even. Historical September climatology places typical overnight minima in the mid-to-upper teens, providing context for why probabilities cluster around 17–20°C outcomes. Updated model runs and official China Meteorological Administration guidance expected within 24–48 hours will likely resolve remaining uncertainty before the market settles.