Current forecast models indicate overnight lows in Chongqing on October 1 will likely fall between 17–21°C amid autumnal transition, with trader odds split near 50% between sub-16°C and 26°C-plus reflecting model spread on air mass advection. Key differentiators include cloud cover and rainfall modulating radiative cooling—clearer conditions enhance nighttime heat loss while persistent humidity and showers from lingering monsoon influences trap warmth—plus steering by regional pressure gradients that could draw cooler northern air or maintain subtropical flow. Historical October minima average near 16°C, but recent wet patterns and variable model runs create genuine uncertainty ahead of final NHC-style updates and observational data releases.