Current model guidance and Jeddah’s June climatology center trader consensus on 38–39°C as the most probable daily maximum for June 16, with closely matched implied probabilities reflecting modest forecast uncertainty. The city’s Red Sea coastal setting typically moderates peaks through onshore flow and sea-breeze timing, while strong solar insolation, minimal cloud cover, and light winds support readings near the 37°C seasonal average. Small differences among ensemble runs—primarily variations in boundary-layer mixing and exact wind speeds—account for the tight spread between 38°C and 39°C outcomes, with lower probabilities for 40°C+ tied to any potential weakening of marine influence. Updated short-range model runs and official Saudi National Center for Meteorology briefings expected in the next 24–48 hours will refine these thresholds.