Recent forecast models from the Central Weather Administration and international sources indicate a minimum temperature in Taipei near 24°C on September 18, driven by typical subtropical nocturnal cooling under moderate humidity, easterly winds, and variable cloud cover that limits radiative heat loss. Light drizzle or patchy rain in some runs may slightly suppress the overnight low by enhancing downward heat flux, while clearer intervals could allow brief drops toward 23°C. The near-even market split between 20°C-or-below and 30°C-or-higher reflects trader uncertainty over final model consensus and any last-minute shifts in steering flow or moisture, with historical September minima averaging around 23–24°C providing limited additional guidance this close to the date.