Jeddah’s coastal Red Sea location and typical early-June climatology anchor trader expectations around 36–37°C as the day’s peak, consistent with long-term station averages near 36–37°C driven by intense solar insolation, minimal cloud cover, and light onshore winds that limit nocturnal cooling while moderating extreme inland heating. Current short-term model guidance and observed conditions show stable high-pressure dominance with afternoon readings climbing into the mid-30s Celsius and little moisture or wind shift to alter the narrow diurnal range. These factors produce the overwhelming 83% implied probability on 36°C, with only modest 14% on 37°C reflecting residual uncertainty in exact peak timing and measurement precision at official stations. No major synoptic changes or heat-wave signals have emerged in the past 48 hours to shift this consensus.