Jeddah's subtropical desert climate produces routine June daytime highs averaging 36–38°C, driven by intense solar heating, minimal cloud cover, and warm Red Sea moisture that elevates heat index values. Current forecasts from multiple models align on peak temperatures of 37–43°C for June 11 under clear, sunny conditions with light winds, placing the daily maximum firmly above 38°C and supporting the market's near-certain implied probability for that outcome. Historical data show June extremes routinely surpassing this threshold, with no recent meteorological shifts such as unusual monsoon intrusions or cooling fronts expected to alter the pattern. Only a major, unforecasted change in steering flow or measurement anomaly at official stations could realistically push the high below 38°C.