**Recent model consensus and official forecasts point to an overnight low in Jinan on August 28 around 21–22 °C, consistent with the market’s leading probabilities clustered at 19–22 °C and above.** A shift from persistent subtropical high pressure—responsible for recent 34–35 °C daytime highs—to a cooler northerly flow accompanied by scattered thunderstorms is the dominant driver. This change, already evident on August 27 with increased cloud cover and precipitation, reduces both daytime heating and clear-sky radiative cooling overnight. Forecast guidance from sources including the Jinan Meteorological Observatory, Yr.no, and WeatherBug consistently shows Friday night lows near 21–22 °C (roughly 70 °F), with moderate humidity and light northerly winds limiting further drops. Historical climatology for late August supports this range, with typical overnight minima near 22 °C. The modest probabilities assigned to cooler thresholds (16–18 °C or below) reflect the limited scope for additional cooling absent a stronger frontal passage or clearer skies, while the elevated chance for 22 °C or higher captures uncertainty in exact timing and coverage of showers. Updated model runs and local nowcasts on August 28 will be the key data releases likely to refine these market-implied odds.