Forecast models from the Japan Meteorological Agency and other agencies indicate mostly cloudy skies with scattered showers possible for Tokyo on July 1, which should limit daytime heating and support overnight lows near seasonal norms of 21–23°C. Recent model runs show consistent guidance for minimum temperatures in the low 20s Celsius, with no strong signals for unusual cooling from northerly flow or warming from clear conditions. This equilibrium explains why trader-implied probabilities cluster tightly around 22–24°C, reflecting genuine uncertainty in exact boundary-layer mixing and precipitation timing rather than divergent long-range trends. Updated short-range guidance expected within 24 hours could refine these ranges ahead of market resolution.