Recent Japan Meteorological Agency forecasts for Tokyo indicate a minimum near 22°C on August 10 amid partly cloudy skies and a 50% chance of scattered showers, aligning with the market's tight clustering around 23–24°C. Typical early-August nocturnal cooling is moderated by high humidity above 70%, urban heat retention, and limited radiative loss under cloud cover, while daytime maxima near 30–33°C set the baseline for overnight lows. Model consensus shows modest variability tied to precipitation timing and wind patterns, with historical normals around 23.8°C providing context. Updated model runs and official briefings ahead of the date remain the key catalysts likely to shift trader-implied odds between the leading outcomes.