Tokyo's early August climate features typical daily highs of 31–33°C under persistent subtropical high pressure, with elevated humidity and urban heat island effects often pushing peaks 1–2°C higher. Current JMA seasonal outlooks and ensemble model guidance point to continued warm advection without significant frontal passages or typhoon influences through August 2, supporting the market's concentration around 33–35°C. Recent multi-year warming trends, including consecutive record summers that prompted JMA's new "kokushobi" designation for 40°C+ days, have shifted the distribution upward from historical baselines. Traders appear to weigh these climatological factors against short-term model variability in maximum temperature forecasts, with resolution hinging on official Tokyo observations.