Recent forecast model consensus for Istanbul points to a daytime high near 15–17°C under persistent northerly flow and widespread showers, with the overnight minimum expected between 11–14°C as cloud cover and precipitation moderate radiative cooling. Strong winds of 20–40 km/h from the north further limit temperature drops by enhancing mixing, while model spreads in shower timing and intensity create the observed market balance near 50% across the 9–13°C thresholds. Official guidance from regional meteorological services highlights this range as the most probable outcome, with limited historical precedent for sub-10°C lows in mid-October absent exceptional cold-air advection. Updated model runs and real-time observations through the evening will be the key near-term catalysts for any shift in trader positioning.