Jeddah's coastal Red Sea location and persistently high dew points near 25–27°C limit overnight radiative cooling, keeping the daily minimum temperature in the upper 20s to low 30s Celsius during late September. Current forecast models from multiple agencies converge on a low of 28–30°C under clear skies, light variable winds, and stable high pressure, with no incoming weather systems to alter the pattern. Trader consensus, reflected in the elevated implied probabilities for 28–30°C outcomes, aligns with these official guidance updates showing minimal day-to-day variability and historical September averages that rarely fall below 27°C. Updated model runs and real-time observations over the next few hours will determine whether the low settles closer to 29°C or edges toward 27–28°C.