Recent short-range forecasts from the Saudi National Center for Meteorology indicate daily highs near 37–39°C for Jeddah on August 9, aligning with the market's close split between the 39°C and 40°C-or-higher outcomes. Jeddah’s Red Sea coastal setting typically moderates peaks through sea breezes and high humidity, with historical August averages around 37–38°C and sea surface temperatures near 31°C. Subtle differences between these thresholds hinge on factors like peak solar insolation, minor shifts in prevailing winds, urban heat effects, or ensemble spread in models. Updated agency guidance over the next 48 hours could clarify whether conditions support an excursion above 39°C.