**Recent forecasts for Jeddah on July 26, 2026, center on daily maximums near 38–39°C (roughly 100–102°F), aligning with the clustered market probabilities around 38–41°C.** Standard July conditions feature intense solar heating under mostly clear skies, with average highs historically near 38–39°C and occasional peaks above 40°C driven by the region's subtropical high-pressure ridge and minimal cloud cover. The Red Sea's proximity adds high humidity that can slightly suppress peak temperatures via marine influence and sea-breeze effects, while urban heat in Jeddah may locally elevate readings. Model consensus shows limited day-to-day variability expected through the weekend, with no major heatwave or anomalous wind patterns noted in current guidance. Differentiation between 38°C, 40°C, and 41°C+ outcomes hinges on small forecast uncertainties in daytime cloud fraction, wind speed (stronger onshore flow cools more), and exact timing of peak insolation. These factors create the tight spread in trader-implied odds, as even modest shifts in boundary-layer moisture or radiative heating can alter the observed maximum by 1–3°C. Updated model runs and official observations closer to the date will likely refine these probabilities further.