Forecast models from sources including GFS indicate partly cloudy skies and light westerly winds over Taipei on September 26, supporting peak heating near 33–34°C amid typical late-September subtropical conditions with high humidity and limited precipitation. Recent observations show daily highs of 33–34°C, slightly above the monthly average maximum near 31°C, driven by persistent warm air masses and adequate solar insolation under variable cloud cover. Minor differences between 34°C and 35°C outcomes hinge on precise timing of maximum insolation, boundary-layer mixing, and any late-day cloud development, with ensemble spreads reflecting these uncertainties in short-range guidance. Traders appear to weigh the balance between current warmth and modest cooling potential from winds.