Recent forecasts from the Central Weather Administration and ensemble models indicate overnight lows in Taipei on September 9 will likely settle between 22–25°C under partly cloudy skies, light northeast winds of 3–6 m/s, and high humidity near 90–98% that limits radiative cooling. Scattered drizzle and residual moisture from earlier monsoon influences suppress temperature drops compared to clearer conditions, keeping the minimum above the seasonal baseline of ~24°C. Close market pricing among 22–25°C outcomes reflects model spread in cloud timing and wind variability, which can alter the nocturnal minimum by 1–2°C through differences in longwave radiation loss and boundary-layer mixing. Updated runs overnight will clarify whether any brief clearing allows a dip toward 22°C or sustains values near 24–25°C.