Recent forecasts from multiple models indicate Jinan’s minimum temperature on September 13 will likely fall in the 18–20 °C range, driven by clear to partly cloudy skies overnight that promote radiative cooling after daytime highs near 30 °C, combined with light variable winds and moderate humidity. This places the outcome near the middle of the closely matched market probabilities, where uncertainty in exact minimum timing, local urban heat effects, and small model spread in boundary-layer temperatures can shift the recorded low by a degree or two. Historical September climatology for the region shows typical overnight lows around 17–19 °C, providing context for the current consensus. Updated model runs and official observations through the night will refine the precise value before market resolution.