Recent forecast models from multiple sources project a high of 26–28°C for Busan on September 21 under clear to mostly clear skies, northeast winds of 10–15 mph, and negligible precipitation. This setup favors strong daytime heating with minimal cloud interference, though moderate winds may moderate peak values slightly below late-summer norms. Trader consensus clusters on 28–29°C because ensemble runs show tight clustering around 27–28°C, with minor divergences in afternoon boundary-layer mixing or exact wind gusts potentially pushing readings 1°C higher or lower. Historical September averages near 26–27°C provide context, while the absence of approaching fronts or typhoon activity supports stability through the 48-hour window. Updated model guidance expected in the next day could refine the maximum before resolution.