Recent forecasts from multiple models indicate an incoming cold front will drive Wuhan's September 17 minimum temperature into the 17–20 °C range, with widespread rain and northeasterly winds enhancing cooling through increased cloud cover and evaporative effects. This shift from recent 24–25 °C lows explains the near-even market split between the 14 °C-or-below and 24 °C-or-higher bins, as traders weigh model consensus on frontal timing against residual uncertainty in exact overnight radiative cooling under persistent overcast skies. Historical September minima in Wuhan average near 20 °C, so the projected 3–5 °C anomaly creates the tightest probability mass around 18–20 °C outcomes visible in the order book. Updated NMC and ECMWF runs expected within 24 hours will likely resolve the remaining variance.