This premise exhibits extreme climatological absurdity. Chongqing, firmly situated in a subtropical monsoon climate, consistently registers April average daily highs in the mid-20s°C. Achieving a -20°C high would necessitate an unprecedented, extreme polar vortex intrusion coupled with severe radiative cooling, a synoptic anomaly fundamentally incompatible with its regional thermal profile. Historical April absolute minima remain significantly above 0°C. The probability of such an event is statistically negligible. 99.9% NO — invalid if the location is mistakenly interpreted as an Antarctic research station.
