Current forecasts from regional models point to a Jeddah overnight low near 28–30 °C on 25 September 2026, with the market’s tight clustering around these levels reflecting modest spread in guidance. Clear skies and light northwesterly flow allow some radiative cooling after sunset, yet persistently high dew points near 24–26 °C and Red Sea moisture limit the drop. Recent days have run 1–2 °C above the September climatological minimum of roughly 27 °C, consistent with the month’s +1.8 °C anomaly so far. Traders appear to weigh the balance between continued warm advection and the potential for slightly stronger nocturnal cooling if winds slacken further before dawn.