Jeddah’s July climatology, driven by a persistent subtropical high-pressure ridge, intense solar heating, and minimal cloud cover along the Red Sea coast, positions daily highs of 38–42 °C as the norm, with the Saudi National Center for Meteorology recording an average July maximum of 40.3 °C. Current short-range guidance from models such as those referenced by AccuWeather, BBC, and timeanddate.com shows July 7 peaks near 37–39 °C under sunny, north-westerly flow, yet the 66.5 % market-implied probability on 40 °C or higher reflects historical variance and the potential for brief intensification or urban-heat amplification to push readings over the threshold. With resolution only two days away and no significant synoptic disruption expected, traders are weighting the strong baseline rate over any single cooler model run.