**Current observational data from Beijing meteorological stations show a daily maximum temperature reaching 20°C on September 30, 2026, under strong northwesterly winds and mostly clear to partly cloudy skies that limited daytime heating.** Multiple forecast models, including GFS runs, aligned with this outcome after a sharp cooldown from prior days, with observed hourly peaks consistently around 20–20.8°C and no evidence of warmer readings. Trader consensus at 100% implied probability for 20°C reflects this close match between real-time measurements and the market resolution criteria. Minor uncertainty remains around final official station verification or micro-scale variations, though conditions make significant deviation unlikely.