**Forecast models for Jeddah on October 13, 2026, cluster around a daytime maximum of 34–36°C under stable high-pressure conditions with mostly clear skies.** Coastal Red Sea moderation and light westerly to northwesterly winds limit extreme heating, while moderate humidity (50–65%) and dew points near 23–28°C support the current market-implied odds favoring 35–36°C. Slight model spread arises from differences in predicted wind strength and timing of the afternoon peak, with some runs showing marginally stronger marine influence that could cap the high at 35°C and others allowing brief warming to 36°C. No significant synoptic changes or moisture intrusions are expected in the next 48 hours, keeping probabilities tightly bunched. Traders weigh these near-term NHC/NOAA-style guidance updates against Jeddah’s October climatology, where daily maxima typically range 33–36°C.