Trader sentiment clusters tightly around 30–32°C because short-range ensemble guidance from the European Centre for Medium-Range Weather Forecasts and Global Forecast System projects an afternoon peak in that narrow band beneath a building Pacific subtropical ridge. This synoptic setup favors partly cloudy skies, light winds, and strong diurnal heating over Taipei’s urban heat island, consistent with Central Weather Administration mid-May climatology that places average daily maxima near 29–31°C. Minor differences in boundary-layer humidity and the timing of any sea-breeze front create the even split among the top three outcomes, while the low odds assigned to values below 28°C or above 33°C reflect the limited chance of either enhanced convection or an unexpected frontal intrusion before the May 18 observation window closes.