Recent forecast runs from the Korea Meteorological Administration and global models point to persistent cloud cover, light rain, and northeasterly flow on August 31 limiting nocturnal radiative cooling in the Seoul-Incheon area, keeping the daily minimum near 22–24 °C. Elevated humidity and the absence of clear skies reduce the chance of sharp drops below 21 °C, while residual late-summer warmth caps upside potential above 25 °C. Model spread remains modest but widens with any timing shift in the approaching frontal boundary or changes in wind speed, which could alter the exact low by 1–2 °C. Traders appear to price this near-term observational uncertainty, with probabilities distributed across the 21–23 °C range rather than converging on a single outcome. Updated model cycles and evening observations from Incheon International Airport will provide the next key signals before resolution.