Mainly as the result of an unusually strong subtropical ridge over southern China, May 2021 was the hottest May in Hong Kong on record. The monthly mean temperature of 29.0 degrees and monthly mean minimum temperature of 27.0 degrees were both the highest on record for May. The mean maximum temperature of 32.1 degrees was the second highest on record for May. There were 14 hot nights during the month, including 6 consecutive hot nights that started from 16 May – both figures broke the records for May.
Long-term time series of the mean temperature in May in Hong Kong