Recent forecasts for Jeddah indicate a daytime maximum near 37°C on August 21, consistent with mid-August climatology of 36–39°C under clear to partly cloudy skies, light northerly winds, and high humidity from Red Sea moisture. Trader consensus clusters tightly around 36–38°C because numerical weather models show only modest spread in peak values driven by small differences in predicted cloud cover and boundary-layer mixing. Historical data confirm August highs routinely reach this range with minimal rainfall, while ongoing heatwave conditions across the region keep upside risk to 39°C or higher limited. Updated model runs from official agencies in the next 48 hours represent the key data releases that could shift implied probabilities.