Recent forecast models show moderate uncertainty in Jeddah's overnight minimum for September 24, keeping the 30°C, 35°C-or-higher, and 25°C-or-below outcomes nearly tied at roughly 36–41%. Coastal Red Sea humidity and potential marine-layer stratus clouds are the dominant variables that could suppress radiative cooling and hold lows near 30°C, while clearer skies or a brief northerly wind shift might allow temperatures to dip toward 25°C. Long-term September climatology places typical minima around 28–32°C, but ensemble spreads from regional models highlight how small changes in boundary-layer moisture or cloud timing could shift the actual low across the 25–35°C range before resolution.