Recent official forecasts from Taiwan’s Central Weather Bureau and international models indicate the lowest temperature in Taipei on September 21 will likely occur overnight under clear to partly cloudy skies, with radiative cooling aided by light northeast winds and moderate humidity levels near 70-90%. Consensus points to a minimum around 22-24°C, consistent with seasonal norms for late September when the northeast monsoon brings stable, drier air after recent showers. Trader sentiment reflects tight clustering around these values because small variations in cloud cover, wind speed, or urban heat island effects can shift the exact reading by 1-2°C, while the absence of typhoon influence or frontal systems keeps probabilities balanced and sensitive to final hourly observations.