**Trader sentiment for the highest temperature in Jeddah on August 6, 2026, centers on 39–41°C, with 40°C holding the strongest implied probability at 43%.** This reflects NCM seasonal outlooks projecting temperatures 1–2.5°C above normal across the Makkah region during August, building on historical August averages of roughly 37–38°C for coastal Jeddah. Jeddah’s Red Sea location typically moderates daytime highs through sea breezes and humidity, limiting peaks relative to inland areas. However, above-normal seasonal guidance, combined with persistent high-pressure patterns and minimal cloud cover or rainfall in early August forecasts, supports the potential for 39–40°C readings at the official station. Short-term model guidance varies, with some sources indicating 37–38°C and others allowing for slight upward revisions under sustained heat. The clustered probabilities around 40°C capture both the elevated baseline from NCM data and remaining uncertainty in exact daily maxima two days out, as small shifts in wind or marine influence can alter the peak by 1–2°C. Lower outcomes (38°C or below) carry reduced weight, consistent with the above-normal climate signal, while 42°C+ remains a lower-probability tail risk tied to any intensification of regional heat.