Recent shifts from subtropical high pressure to post-thunderstorm northerly flow after widespread rains on August 27–29 have moderated overnight temperatures in Jinan, producing the tightly clustered market odds around 12–22°C. Official forecasts from the China Meteorological Administration and international models show low temperatures potentially reaching 18–21°C under partly clear skies, where radiative cooling competes with residual humidity and light winds to set the minimum; historical late-August baselines near 20–22°C provide context but recent cooling trends widen the range. Trader consensus reflects genuine uncertainty in model runs for exact minimum thresholds, with resolution hinging on the final 24-hour observational data from local stations.