**Current forecasts from meteorological models and regional monitoring consistently point to a daily maximum of 39°C in Jeddah on September 16, driving the near-certain market-implied odds.** Jeddah’s coastal location along the Red Sea sustains high temperatures through persistent southerly or westerly flow and limited cloud cover in mid-September, with climatological normals near 36–38°C. Recent model runs show stable high-pressure conditions and minimal moisture advection that suppress convective cooling, aligning observed daytime peaks with the 39°C threshold. Minor uncertainties remain from potential localized sea-breeze effects or slight timing shifts in the diurnal cycle that could alter the exact recorded maximum at official stations.