Current forecasts from Taiwan’s Central Weather Administration and international models indicate partly cloudy conditions with northeast winds for Taipei on September 22, supporting daytime highs of 29–31 °C. This aligns with September climatology, where average highs reach approximately 30–31 °C amid high humidity and limited rainfall. Model consensus shows stable steering patterns without significant tropical cyclone influence or cold-air intrusions in the near term, keeping temperatures in the narrow 29–32 °C band most probable. The market’s heaviest weighting on 31 °C reflects this tight forecast envelope and low expected variability, while the secondary 32 °C probability accounts for minor upside from urban heat or brief clearing. Updated model runs and any last-minute pressure changes will be the key near-term drivers.