**Official observations from the Korea Meteorological Administration and Incheon International Airport confirm a daily maximum of 19°C on October 14, 2026, driving the market's near-certain consensus.** Following record October warmth earlier in the week, northwest cold-air advection produced a sharp cooldown, with morning lows near 10–14°C and daytime highs limited to 18–22°C across the region. Multiple hourly reports and station data show temperatures peaking at 19°C under mostly clear to partly cloudy conditions with moderate westerly winds, consistent with forecast model consensus. This aligns with climatological expectations for mid-October after a transient warm spell. The only realistic challenges would involve post-event data revisions at the Incheon station or an unusually late surge in insolation, both of which remain improbable given the volume of real-time measurements.