**Market-implied odds for Beijing’s August 13 high temperature cluster tightly around 30–31 °C because ensemble forecast models from major centers show maximum surface temperatures centered in that narrow band two days ahead.** August climatology places Beijing’s average daily high near 29–30 °C, so the current guidance reflects a modest positive anomaly driven by subsiding air under a ridge and limited cloud cover. Small differences in predicted timing or intensity of afternoon showers, boundary-layer mixing, or low-level wind shifts can easily swing the peak by 1 °C, producing the near-even split between the 30 °C and 31 °C outcomes. New model runs and observational updates through the next 48 hours will determine whether the distribution shifts measurably before resolution.