Hong Kong this year experienced its third-warmest autumn on record, bolstered by a particularly sunny November and the hottest September since 1884. Last month saw more than 230 hours of sunshine in total, 35 per cent more than the norm over the preceding 30 years, the Observatory said in its monthly weather summary on Thursday. The mean daily maximum temperature, meanwhile, was 25.4 degrees Celsius, 0.9 degrees higher than usual. “Mainly attributed to the exceptionally hot weather in September 2021, the autumn of this year from September to November was much warmer than usual with the mean temperature reaching 26 degrees, the third highest on record for the same period,” the report said. According to Observatory data, 2015 and 2019 tied for the distinction of warmest autumn on record, with mean temperatures reaching 26.1 degrees in both years. The lowest temperature recorded this autumn was on November 23, when the mercury fell to just 14.3 degrees at the Observatory’s building in King’s Park in Tsim Sha Tsui. This September also saw 15 “very hot days” – defined as having a high of at least 33 degrees – the most for that month since record-keeping began in 1884. The heat was mainly attributed to the combined effects of climate change and the powerful Typhoon Chanthu, which moved slowly across the region, sweeping from the Philippines to Japan over the course of two weeks. The total number of very hot days this year has also surpassed 2020’s as the most ever recorded, with 54 so far. Last year saw just 47. Forecasters have predicted temperatures from December to February will range from normal to slightly warmer than usual, taking into consideration global warming among other factors.