A -15°C maximum temperature for Wellington is an absolute climatological impossibility. The city's temperate maritime climate sees average April highs around 17°C, with the lowest recorded temperature *ever* being -1.9°C. A positive daytime maximum is the meteorological norm. This extreme sub-zero high is an atmospheric anomaly of unprecedented scale, inconsistent with established synoptic patterns. 99.9% NO — invalid if the official reporting station has a catastrophic sensor malfunction.
