Recent numerical weather prediction models from sources including the European Centre for Medium-Range Weather Forecasts and local meteorological services converge on a peak daytime temperature of 35–36°C for Jeddah on October 2, 2026, under clear skies and light to moderate westerly winds. The city’s Red Sea coastal setting provides a moderating marine influence via sea breezes that typically peak in the afternoon, while high humidity near 50% and stable high pressure limit convective cooling or warming anomalies. Historical climatology shows early-October maxima averaging near 34°C with a standard deviation of roughly 2°C, placing both 35°C and 36°C outcomes well within normal variability. No significant synoptic features or dust events are expected to alter the diurnal temperature curve, leaving the precise maximum dependent on the timing and strength of the sea breeze and exact observational site.