Recent monsoon (Changma) activity and associated cloud cover over the Korean Peninsula are the main drivers keeping Seoul's July 9 overnight low centered near the historical 23–24 °C average. Persistent humidity and periodic rain suppress nighttime radiative cooling by trapping long-wave radiation, while any breaks in cloud allowing clearer skies could permit greater heat loss and push the minimum toward 21–22 °C. Short-range model consensus from the Korea Meteorological Administration shows limited day-to-day variability this week, with steering winds and frontal position as the key variables that could shift the outcome by 1–2 °C. Trader prices clustered tightly around 22–25 °C reflect this narrow uncertainty band two days before resolution.