Traders assign near-certainty to 31°C as Taipei’s daily maximum on September 5, reflecting the latest surface observations and short-range model guidance from regional meteorological services. Late-summer atmospheric conditions, including typical subtropical high pressure and light winds, have produced a stable temperature profile that aligns closely with this threshold, consistent with climatological norms for early September. The market’s positioning incorporates real-time station data showing the high stabilizing near this level well before sunset. Only an unexpected late-day surge from localized convection or a revision in official measurement protocols could shift the recorded peak, though current model consensus and observational trends make such outcomes improbable.