Forecast models from sources including the Turkish State Meteorological Service indicate Istanbul's maximum temperature on October 12 will likely reach 24–25°C under increasing cloud cover as the brief October warm spell ends. An incoming weather system is expected to bring rising humidity, light winds shifting northerly, and a low precipitation chance early in the day before broader rain arrives later. This transitional synoptic pattern, following above-average readings near 25–26°C on October 11, caps daytime heating compared to recent clear conditions while remaining above seasonal norms. Ensemble guidance shows limited spread, supporting trader consensus around these thresholds ahead of official daily observations.