Jeddah’s coastal Red Sea location produces typical mid-June highs of 36–38 °C under stable high-pressure patterns, strong solar insolation, and light northwesterly winds that allow modest sea-breeze moderation. Current forecasts from multiple agencies converge on a daily maximum between 36 °C and 39 °C for 16 June 2026, with no significant cloud cover or frontal systems expected to alter the trajectory. This narrow climatological band, combined with recent days showing peaks near 37 °C and inherent model spread in exact timing of the afternoon maximum, explains the closely matched market probabilities clustered around 37–39 °C. Updated model runs and station observations in the final 24 hours will determine whether the peak settles at the lower or upper end of that range.