Recent forecasts from Central Weather Administration models and international agencies project minimum temperatures in Taipei on September 23 near 23°C, driven by the onset of the northeast monsoon combined with clear to partly cloudy skies that promote nighttime radiative cooling. This seasonal transition from summer patterns—marked by drier air and reduced cloud cover—has produced consistent diurnal ranges of 8–10°C in recent days, aligning with historical September baselines around 24–25°C lows. Trader emphasis on the 23°C outcome reflects stable model consensus and absence of typhoon or frontal systems that could alter steering or moisture. No significant forecast revisions are anticipated before resolution.