Recent observational data and forecast models from agencies monitoring the Red Sea coast indicate Jeddah's overnight minimum on October 15 will likely settle between 28–29 °C under clear skies, light northerly winds, and moderate humidity near 70 percent. Radiative cooling after sunset is tempered by the urban heat island and marine influence, preventing deeper drops below the seasonal baseline. Ensemble guidance shows tight clustering around these thresholds, with minor model spread arising from exact timing of the nocturnal minimum and dew-point depression. Traders have priced the two leading outcomes near parity because resolution hinges on the precise lowest hourly reading at official stations, where even a 1 °C difference in boundary-layer mixing can shift the final value. Updated short-range runs later today will refine the outcome before the market settles.