Official Japan Meteorological Agency forecasts for Tokyo on August 25 project a minimum temperature of 26°C under mostly clear to partly cloudy conditions with low precipitation chances, aligning with the market's strong consensus around 26–28°C. Late-summer atmospheric patterns, including persistent high pressure and the urban heat island effect from Tokyo's dense infrastructure, typically limit overnight radiative cooling and keep lows elevated above the long-term August average of 24°C. Recent model runs show limited variability in steering patterns or moisture, reducing the likelihood of cooler air advection that would push readings toward 25°C or below. Traders appear to price in these climatological baselines and the absence of disruptive systems, with the 27°C outcome reflecting slight upward bias from expected humidity retention. Updated JMA guidance and any late-model shifts remain key near-term catalysts.