Traders have converged on a 36°C high for Jeddah on September 23, 2026, reflecting consistent meteorological model outputs and real-time observations showing a daytime peak near that threshold under clear skies and light northwesterly winds. Regional conditions, including elevated Red Sea humidity and the influence of a subtropical ridge, support typical late-September maxima around 36–37°C, with official station data confirming afternoon readings climbing to this level before evening cooling to the low 30s. The overwhelming market-implied probability aligns with this consensus while acknowledging minor forecast uncertainty from potential microscale variations in cloud cover or sea breezes that could trim the peak by 1–2°C.