Recent forecasts from the Korea Meteorological Administration and global models indicate a transitional pattern over the Korean Peninsula, with a migratory high-pressure system supporting partly cloudy to mostly cloudy skies on October 17 and southeasterly winds limiting full solar heating. After record mid-October warmth earlier in the month, cooler air advection from the northwest is expected to moderate daytime maxima, producing a narrow range of projected highs centered near 24–26 °C. Model consensus shows limited disagreement on cloud cover and timing of any weak frontal passage, which could trim peak temperatures by 1–2 °C or allow brief clearing to push readings slightly higher. This uncertainty, combined with typical diurnal swings of 10 °C or more, keeps the 25 °C and 26 °C outcomes closely matched in trader pricing ahead of updated model runs and official briefings.