Traders assign the highest implied probabilities to a 29–31°C minimum in Jeddah on August 22 because recent global model guidance and local climatology converge on overnight lows near the long-term August average of 28–30°C. Persistent Red Sea moisture, light westerly land breezes, and limited nocturnal radiative cooling under mostly clear skies keep temperatures from dropping further, while the absence of unusual upper-level ridging or Saharan air intrusions prevents stronger suppression of the minimum. Short-range ensemble spreads from agencies monitoring the region remain tight around this narrow band, with only modest day-to-day variability expected before the 24-hour window closes.