Trader consensus overwhelmingly favors 31°C as Singapore’s highest temperature on October 15, reflecting stable tropical conditions and National Environment Agency forecasts showing a maximum near that threshold. October falls in the inter-monsoon period, when typical daily highs range 30–32°C under moderate humidity and light winds, with minimal deviation from climatological baselines. Official observations from Changi and other stations confirm no heatwave drivers such as strong subsidence or anomalous sea-surface temperatures are present. While rare convective bursts or localized urban heating could push readings slightly higher, historical data and model consensus indicate these scenarios remain low-probability on this date. Final station measurements will determine resolution.