Recent model runs from NOAA and regional meteorological agencies highlight strengthening high-pressure systems over the Arabian Peninsula, combined with reduced Red Sea humidity and light northerly winds, as the main drivers pushing Jeddah’s projected maximum toward 46–47 °C on May 18. These conditions favor enhanced daytime heating under clear skies and minimal cloud cover, elevating surface temperatures above the May climatological average of 36–37 °C. Coastal sea-breeze moderation introduces variability that keeps 45 °C and 48 °C+ brackets nearly as probable, with the exact peak hinging on afternoon wind shifts and any late-day moisture influx. Traders appear to weigh the narrow 1 °C resolution bands against historical May extremes that have occasionally reached the mid-40s when continental air dominates.