Forecast models from multiple sources, including the China Meteorological Administration, indicate a daily maximum of 27°C in Beijing on September 29 under mostly clear to partly cloudy skies with light northerly winds. This aligns with observed afternoon peaks in hourly data reaching that threshold before cooling overnight. The 100% market-implied odds for 27°C reflect strong trader consensus grounded in consistent numerical weather prediction outputs and recent observational trends for late-September conditions. A shift in steering patterns allowing greater cloud cover or enhanced mixing from strengthening winds could lower the realized high by 1–2°C, while clearer skies and reduced ventilation might push readings slightly above the consensus value before official verification.