**Trader consensus has converged on a 30°C high for Tokyo on September 22 as official observations from the Japan Meteorological Agency align with this exact threshold.** Recent model runs and station data show afternoon peaks near 29–30°C under partly cloudy skies with light winds, consistent with late-September climatology where daily maxima average around 25–27°C but can edge higher amid transitional patterns. The 100% implied probability reflects real-money assessment of verified measurements rather than forecasts, with minimal dispersion across lower or higher bins. Resolution hinges on the final recorded maximum at the primary Tokyo station; minor adjustments from localized cooling, timing of cloud cover, or station-specific readings could shift the outcome if they push the official value outside the narrow 30°C band.