Recent forecasts from the Japan Meteorological Agency and international models indicate persistent high pressure and southerly flow over the Kanto region, sustaining above-average warmth into early September and supporting overnight lows near 25°C for Tokyo on September 2. Current guidance shows minimum temperatures clustering between 24–26°C, with limited cloud cover and dew points around 23–24°C limiting further radiative cooling. A developing weather front and potential tropical system south of Japan are expected to influence conditions later in the week but remain too distant to alter the immediate diurnal range. Market-implied probabilities align closely with these outputs, assigning the highest weight to 25°C while discounting cooler outcomes below 23°C or warmer readings above 27°C absent a significant forecast shift in the next model cycle.