Traders price 37°C or higher as the leading outcome for Jeddah’s peak temperature on May 17 because current numerical weather models and seasonal climatology show daytime maxima climbing into that range under clear, dry conditions typical of late spring in the Red Sea coastal zone. With May averages near 36–37°C and recent observations already hitting 34–41°C across western Saudi Arabia, the absence of any significant cloud cover or maritime cooling favors additional warming by tomorrow afternoon. Official guidance from regional meteorological centers continues to highlight stable high-pressure dominance, keeping the probability of sub-37°C readings low while leaving room for model adjustments as new satellite and surface data arrive before market resolution.