Recent forecasts for Jeddah place the June 23 maximum near the long-term June climatology of 36–38 °C, with ensemble guidance from global models showing a narrow spread driven by subtle differences in low-level wind flow off the Red Sea and the strength of the subtropical ridge. Sea-breeze circulation and high boundary-layer humidity typically cap daytime peaks relative to inland sites, while clear skies and weak subsidence favor readings at or above 37 °C. Current trader positioning—with 37 °C slightly ahead of 35 °C and 38 °C or higher—reflects uncertainty in how much marine moderation versus continental heating will dominate on the day, as small shifts in 10-meter winds or cloud cover can move the outcome by 1–2 °C. Updated short-range model runs and local observations over the next 48 hours will refine these probabilities ahead of market resolution.