Current forecasts from multiple models indicate a daily minimum temperature in Jeddah on September 24 likely between 27–30°C, driven by persistent subtropical high pressure, clear to partly cloudy skies, and light northerly or westerly winds that limit nocturnal cooling. Jeddah’s Red Sea coastal location sustains elevated humidity levels near 60–75%, which reduces longwave radiative heat loss overnight, while regional climatology shows September minima averaging 28–29°C with low variability absent major weather systems. Recent observations through September 22 confirm stable conditions with no significant frontal passages or increased cloud cover expected in the 48-hour window, though minor model spreads in boundary-layer moisture and wind speed introduce uncertainty around whether the low edges toward the mid-20s or holds near 30°C. Traders appear to weigh these factors evenly, reflecting the narrow historical range and limited short-term volatility in this arid coastal environment.