Recent official forecasts from multiple meteorological models, including ICON-EU and regional analyses, indicate an incoming cooler air mass with northerly winds and widespread showers or light rain across Istanbul on October 13, limiting daytime solar heating and capping the maximum temperature near 18–19°C. This follows a warmer October 12 peak around 23–24°C under clearer conditions. Persistent cloud cover and precipitation probabilities exceeding 70% in afternoon hours further suppress warming, aligning with climatological October averages near 19°C while reflecting the current frontal passage. Trader consensus heavily favors these values, with model agreement reducing upside risk from transient warming, though minor variations in rain timing could shift the exact high by 1°C.