Recent ensemble forecasts from major models indicate persistently warm overnight conditions across the Kanto region, supporting trader consensus around a 27–28°C minimum on July 21. High pressure and limited cloud cover have maintained elevated dew points and reduced radiative cooling, while regional sea-surface temperatures remain above seasonal norms. These factors differentiate the closely matched 27°C and 28°C outcomes, as small shifts in wind direction or boundary-layer moisture could alter the low by 1°C. Updated runs from the Global Forecast System and European Centre for Medium-Range Weather Forecasts, expected within the next 24 hours, will likely refine resolution criteria for the daily minimum recorded at the Tokyo station.