Current short-term forecasts from multiple models indicate Qingdao's minimum temperature on September 18 will likely fall in the 19–22°C range, consistent with typical mid-September coastal conditions moderated by the Yellow Sea and southeasterly flow. This consensus underpins the market's tight split between 16°C-or-below and 26°C-or-higher outcomes, as traders price in residual model uncertainty and potential last-minute shifts from evolving cloud cover, wind patterns, or radiative cooling under clearer skies. Historical September lows average near 18–20°C with modest day-to-day variability, while the absence of strong frontal systems or anomalous advection keeps extremes less probable. Updated guidance from agencies like the China Meteorological Administration ahead of the 48-hour window will likely narrow the distribution around the central 20–21°C cluster.