Current forecasts from multiple models, including those aligned with National Center for Meteorology guidance, indicate a highest temperature near 37–39°C for Jeddah on September 1, driven by persistent subtropical high pressure, northwest winds off the Red Sea, and typical early-September climatology with average highs around 36.5–37.5°C. Recent late-August observations show daily maxima fluctuating between 37–40°C without major heat anomalies or cooling systems, supporting the market's strong weighting toward 38°C (43% implied probability) and 39°C (31.5%). Low odds on extremes reflect limited variability expected under stable, dry conditions, though minor model spreads in peak timing or local sea-breeze effects introduce modest uncertainty resolved by final observations.