Forecast models from multiple agencies indicate Beijing's August 28 high will likely fall in the low-to-mid 20s °C amid extensive cloud cover and rain from an approaching frontal system, which reduces solar heating and caps daytime maxima well below late-August climatological norms near 30 °C. Light winds and high humidity further limit temperature recovery, while steering patterns keep the city under the cooler air mass. Ensemble spread in GFS and ECMWF runs creates genuine uncertainty around exact peak values, with resolution hinging on precise timing of precipitation and any late-day clearing. Updated model guidance and official China Meteorological Administration briefings expected in the next 24–48 hours will refine these temperature thresholds.