Recent forecasts from the Korea Meteorological Administration and global models indicate stable high-pressure conditions over the Korean Peninsula, supporting partly cloudy to mostly clear skies and light northeasterly winds of 5–10 km/h on September 19. These factors limit daytime mixing and cloud shading, favoring maximum temperatures near 27–28°C in the Incheon-Seoul area, consistent with the market’s tight 47.5% and 38.5% shares on those outcomes. Current runs show limited model spread, with minor differences arising from exact timing of any thin high clouds or slight variations in boundary-layer humidity. Precipitation chances remain below 20%, and the pattern aligns with seasonal norms for mid-September following the typical post-monsoon cooling trend. Updated model guidance and official briefings later today represent the primary near-term catalysts that could shift implied probabilities between the leading bins.