Recent forecasts from the Turkish State Meteorological Service and global models indicate Istanbul's maximum temperature on October 12 will likely reach 24–25°C amid the transition from a brief warm spell to a cooler, cloudier pattern with possible showers. This consensus, driven by an incoming weather system that ends above-average autumn warmth, positions 24°C as the market leader with strong implied probability, while 23°C and 25°C reflect minor variations in model timing for peak heating and precipitation onset. Historical October maxima average near 19–20°C, underscoring the current anomaly, though exact resolution hinges on afternoon observations from official stations as frontal activity develops. Traders weigh these ensemble outputs against rapid updates expected overnight.