Traders see the 38–40°C range as the most likely outcome for Jeddah’s August 5 maximum temperature because official guidance from Saudi Arabia’s National Center for Meteorology and global models consistently point to peak readings in that band under typical late-summer conditions. Coastal Red Sea moderation, prevailing northwesterly winds, and high humidity limit extreme inland-style heating, yet clear skies and minimal cloud cover allow strong daytime insolation to push values toward the upper end of climatological averages near 37–38°C. Recent seasonal outlooks noting a modest positive temperature anomaly across western Saudi Arabia support the slight upward tilt in market-implied odds, while model spread on exact peak timing and localized sea-breeze strength keeps 37°C and 40°C+ probabilities closely bunched. Updated short-range runs and NCM briefings tomorrow morning will provide the final data for resolution.