**Forecast models from sources including the Met Office, local Saudi monitoring, and international services like WeatherBug and PredictWind converge on a daily high of 36–39°C for Jeddah on August 29, 2026, under persistently sunny skies and light westerly winds.** This places the market-implied probabilities—led by 38°C at 45.5% and 37°C at 32.5%, with 39°C+ at 18.5%—in close alignment with observed climatology and real-time guidance. Jeddah’s hot desert (BWh) climate features August average highs near 36–38°C, driven by strong solar insolation, minimal cloud cover, and Red Sea moisture that elevates humidity without triggering precipitation. Current surface observations show temperatures climbing through the mid-30s by midday, with dew points around 24–28°C supporting heat indices well above air temperature. No significant synoptic features, such as upper-level troughs or sea-breeze strengthening, are indicated to suppress or enhance the peak, keeping the distribution tightly centered on 37–38°C. Traders appear to weight the slight model spread—some runs peaking at 36°C while others reach 39°C—along with typical intra-day variability at the King Abdulaziz International Airport station. Resolution hinges on the official daily maximum recorded there, a threshold sensitive to exact timing of the afternoon peak and any minor wind shifts. With resolution imminent and conditions stable, the market reflects high-confidence consensus around the historical late-August norm rather than extreme outliers.