Recent forecasts from sources like the China Meteorological Administration and international models indicate Jinan’s overnight low on September 17 will likely settle near 18–21 °C under mostly cloudy skies, light southwesterly winds of 3–5 km/h, and moderate humidity around 45–55 %. These conditions limit radiative cooling compared with clear nights, while daytime highs near 31–34 °C reflect residual warmth from a stable high-pressure pattern. Model consensus shows modest day-to-day cooling from the prior week’s warmer readings, narrowing the expected minimum range and supporting the tight clustering of market-implied probabilities around 18 °C versus slightly lower or higher thresholds. Updated evening observations and final official readings from local stations will determine exact resolution.