Recent forecasts from multiple models indicate mild overnight lows for Istanbul on October 11, centered in the mid-teens Celsius amid transitioning autumn conditions influenced by Mediterranean and Black Sea air masses. Trader sentiment remains closely balanced between sub-10°C and 19°C+ outcomes because ensemble guidance shows modest spread in minimum temperatures driven by variable cloud cover, wind patterns, and potential weak frontal passages that could enhance or suppress radiational cooling. Current high-pressure dominance supports warmer baselines near 16–19°C, yet small shifts in steering flow or moisture could push readings lower, sustaining the tight market-implied odds ahead of updated model runs.