Recent forecasts from multiple meteorological sources indicate Beijing will likely see sunny conditions and a daily maximum near 29–30°C on September 15, supporting the close clustering of market-implied odds around those outcomes. Model consensus points to light southerly winds, low humidity, and minimal cloud cover allowing strong daytime heating, though small differences in predicted peak timing or urban heat island effects could shift the exact high by 1–2°C. Historical averages for the date sit near 26.5°C, with records reaching 31.9°C, providing context for why traders assign meaningful probability to 31°C while discounting extremes above 34°C or below 27°C. Fresh model runs and official updates from the China Meteorological Administration in the next 48 hours represent the key upcoming data points likely to refine these probabilities.