**Current forecasts from multiple models indicate minimum temperatures in Jeddah on September 18 will likely fall in the 27–30°C range, aligning with the market’s leading outcomes at 29–31°C.** Jeddah’s Red Sea coastal location sustains elevated humidity and limits nocturnal radiative cooling, while light variable winds and clear skies under stable high pressure maintain typical late-summer warmth. Recent observations show no significant cold-air intrusions or unusual synoptic patterns, with September 2026 minima running near or slightly above the long-term average of 27–29°C. Model consensus remains tight, with only modest day-to-day variability expected through the short forecast window. Traders appear to be weighting the high probability of a minimum near 30–31°C based on persistent thermal and moisture conditions rather than any outlier cooling scenario.