Recent rainfall and associated cloud cover over Beijing have cooled surface temperatures ahead of August 28, with official forecasts from the China Meteorological Administration indicating a minimum near 18–20°C under northerly flow and lingering showers. This aligns closely with the 1991–2020 climatological average low of 20°C for the date while reflecting a short-term departure driven by weak cold-air advection and reduced insolation. Model consensus shows limited spread in overnight radiative cooling potential, but variability in exact precipitation timing and boundary-layer mixing could shift the realized minimum across the 18–22°C range. Traders weigh these near-term dynamical factors against the narrow historical envelope, where extremes below 15°C or above 23°C remain rare in late August.