Forecast consensus from recent model guidance positions Jeddah’s June 15 peak near the historical June average high of 37°C, with coastal Red Sea influences—persistent humidity, light onshore breezes, and strong but moderated solar insolation—creating a narrow range that clusters implied probabilities around 36°C, 37°C, and 38°C or higher. Clear skies and stable high pressure favor rapid daytime warming to near or slightly above the climatological norm, yet variable afternoon wind shifts or minor marine-layer effects introduce enough uncertainty to keep the three leading outcomes within 1–2 percentage points. Official short-range updates expected overnight will refine the exact maximum, as small differences in peak timing or boundary-layer mixing can shift the daily high across these tightly spaced thresholds.