Traders have converged on 37°C as the highest temperature in Jeddah on September 26 due to consistent official forecasts from regional meteorological models projecting a daily maximum under clear skies, light to moderate northwesterly winds, and typical late-September humidity levels around 50-70%. Observed readings through the afternoon reached 36°C with dew points near 24-26°C, aligning closely with climatological September averages of 35-36°C highs at Jeddah stations. This positions the outcome as the expected peak based on real-time data assimilation. A realistic challenge could arise from increased afternoon cloud cover suppressing insolation, stronger sustained winds promoting evaporative cooling, or minor discrepancies in station-specific maximum readings that fall to 36°C or below.