Trader consensus around 38–40°C for Jeddah’s August 23 peak reflects typical late-summer Red Sea coastal conditions, where persistent high pressure and light northwesterly winds limit cooling while allowing strong daytime heating. Recent model runs show minimal disagreement, with clear to partly cloudy skies and dew points near 15–20°C supporting efficient surface warming but moderated by sea-breeze effects and moderate humidity around 30–50%. Historical August maxima average near 38°C, and the past week’s observed highs have clustered in the upper 30s to low 40s without extreme anomalies. Minor forecast spreads hinge on exact timing of peak insolation and any late-day cloud increases that could cap the daily maximum, leaving the narrow 38–40°C window as the most probable outcome under current atmospheric stability.