**Coastal marine moderation and forecast model spread are the main drivers behind the tight clustering of Polymarket odds around 23–25 °C for Qingdao’s minimum temperature on 22 August 2026.** Qingdao’s Yellow Sea location keeps overnight lows higher than inland Shandong sites through persistent onshore flow, while late-August climatology shows typical minima near 23–24 °C as seasonal cooling begins. Current numerical guidance (including regional models) produces a narrow envelope centered on 24 °C, with some runs favoring 23 °C under clearer skies and others 25 °C if clouds or showers limit radiational cooling. Light rain or thunderstorm chances noted in several forecasts introduce additional uncertainty in the exact low, keeping the 24 °C outcome narrowly ahead at 39 % implied probability while 23 °C and 25 °C remain within a few percentage points. No major synoptic shift is expected before the observation window closes, so trader consensus reflects this modest but unresolved range rather than any single dominant outcome.