Beijing’s midsummer subtropical monsoon regime typically sustains daytime highs near or above 30–32 °C through strong solar heating and urban heat-island amplification, supporting the market’s leading 64.5 % probability for 32 °C or higher on 13 August. Recent numerical weather prediction runs from the China Meteorological Administration and global models show an approaching mid-latitude trough and associated frontal rainfall expected to increase cloud cover and evaporative cooling, shifting consensus forecasts toward 26–27 °C highs. Traders appear to weigh lingering model spread and the possibility of delayed or lighter precipitation against climatological norms, keeping elevated-temperature outcomes dominant while assigning meaningful weight to the 30–31 °C range. Updated model cycles and official guidance ahead of the event will be key catalysts for any shift in implied probabilities.