Current ensemble forecasts for Jeddah on October 5 show peak temperatures stabilizing in the mid-30s Celsius under persistent clear skies and light southwesterly flow, with models converging on 35–36°C as the most probable range. This reflects the seasonal decline in solar insolation during the autumn transition along the Red Sea coast, where reduced daytime heating combines with high boundary-layer humidity to moderate maximums relative to summer peaks. Minor differences between leading outcomes hinge on subtle variations in afternoon mixing depth and any residual moisture advection, which could shift the diurnal maximum by 1°C. Historical October averages near 36°C provide context, while the absence of significant synoptic systems supports the tight clustering around these values ahead of station observations.