Recent forecast guidance for Jeddah points to a daily maximum near 37–38°C on June 19, consistent with the market’s tight clustering around those outcomes. Mid-June climatology at King Abdulaziz International Airport shows average highs of 36–38°C, driven by strong solar heating under subtropical ridging tempered by Red Sea sea breezes and moderate northwesterly winds. Variability in the 37–39°C range stems from uncertainty over exact wind speed and direction, which can either enhance or suppress the moderating marine influence, plus minor differences in model handling of boundary-layer moisture. With no major synoptic systems expected, traders weigh the latest model runs against historical June distributions, where readings of 36°C or below remain possible only with unusually strong onshore flow and values at or above 39°C require suppressed breezes. Final official observations tomorrow will resolve the market.