Forecast models and observational data from multiple sources indicate Jeddah will reach a daytime maximum of 37°C on June 9 under clear skies, light northwesterly winds, and typical early-summer high-pressure conditions over the Red Sea coast. This aligns with the region’s climatological baseline, where June highs average 36–38°C, moderated by marine humidity that prevents sharper spikes. No significant model divergence or unusual atmospheric features appear in current guidance, supporting the market’s near-certain pricing for the 37°C outcome. Official readings from Saudi Arabia’s National Center for Meteorology will resolve the market; only an unexpected late-day surge above 38°C or a measurement revision could shift the result.