Traders assign a 96.5% implied probability to Jinan’s lowest temperature on August 26 reaching 22°C or higher, driven by robust climatological baselines and current forecast guidance for late August in Shandong province. Typical minimums in this period fall between 22–26°C under the East Asian monsoon regime, with ensemble models from the China Meteorological Administration showing stable subtropical high pressure and no significant cold-air intrusions. Historical records confirm sub-20°C lows are uncommon without strong synoptic shifts, which are absent in recent observations. While model uncertainty or an unexpected frontal passage could theoretically lower readings, the weight of atmospheric data and seasonal norms supports the dominant market consensus.