Clear skies and light southerly winds are the main drivers keeping trader sentiment balanced for Jinan’s September 22 minimum temperature, with forecasts from multiple models converging on 19–20 °C overnight lows under dry, stable high-pressure conditions. Radiative cooling after daytime highs near 30–32 °C will be moderated by mild advection from the south and low humidity, limiting the drop compared with typical early-autumn radiational nights. Historical September minima in Jinan average 16–18 °C, so the current setup sits near the upper end of the normal range. Model consensus remains tight, but small shifts in cloud cover or wind direction before dawn could alter the final reading by 2–3 °C, sustaining the near-even implied odds between sub-12 °C and 22 °C-plus outcomes. Official updates from the China Meteorological Administration overnight will provide the last key inputs before resolution.