Recent easing of heavy rainfall across northern Taiwan, combined with strengthening northeasterly winds and reduced cloud cover, is the main driver shaping overnight cooling expectations for Taipei on September 8. Official Central Weather Administration guidance and ensemble models indicate minimum temperatures likely falling into the low-20s°C range under partly clear skies, where radiative cooling and lower humidity enhance heat loss after daytime highs near 30°C. Persistent moisture from prior systems and variable wind speeds introduce uncertainty in exact minima, with some guidance suggesting slightly warmer readings if cloud cover lingers. This spread explains the closely matched market-implied odds across 22–25°C outcomes alongside elevated probability on warmer thresholds, reflecting traders weighting the balance between post-rain stabilization and potential for limited nocturnal mixing. Updated model runs and evening observations will refine resolution criteria tied to official station readings.