Due to the stronger than usual subtropical ridge persisting over southern China, Hong Kong experienced the hottest summer – from June to August 2020 – since records began. The summer's mean maximum temperature of 29.6 degrees, mean temperature of 32.6 degrees and mean minimum temperature of 27.7 degrees were all the highest on record respectively for this period. The monthly mean temperature of 30.2 degrees, monthly mean maximum temperature of 33.3 degrees, monthly mean minimum temperature of 28.3 degrees, 21 hot nights and 20 very hot days in July 2020 were the highest of these monthly values on record. With 13 consecutive hot nights that started from 19 June to 1 July, the record of number of consecutive hot nights was also broken.
Long-term time series of mean temperature in summer in Hong Kong