The Weather of June 2014
With the monthly mean temperature reaching 29.0 degrees, June 2014 was the hottest June in Hong Kong since records began in 1884. The monthly mean minimum temperature of 27.0 degrees and maximum temperature of 31.5 degrees were respectively one of the second and the third highest for June. Such high temperatures were attained despite the facts that sunshine duration and rainfall for the month were not far from normal. The total rainfall of the month was 436.6 millimetres, about 4 percent below the normal figures of 456.1 millimetres. The accumulated rainfall since 1 January of 1503.4 millimetres was about 37 percent above the normal figure of 1096.9 millimetres for the same period.
Under the dominance of an anticyclone aloft, the weather in Hong Kong was mainly fine and very hot for the first two days of the month. Affected by a trough of low pressure, it turned cloudy with some showers and isolated thunderstorms on 3 June. With the trough of low pressure pushed back towards the mainland areas of Guangdong, fine and hot weather returned on 4 June apart from a few morning showers. However, the lingering presence of the trough continued to bring a mixture of sunshine and thundery showers to the territory in the next four days.
With the setting in of a fresh easterly airstream on 9 June, showers and thunderstorms gradually eased off and there were sunny intervals during the days on 10 and 11 June. Under the influence of a dry continental airstream, local weather remained mostly fine and dry for the ensuing three days.
While Hong Kong experienced a very hot day on 14 June, a tropical depression formed over the northeastern part of the South China Sea and intensified into a tropical storm named Hagibis. Tracking generally northwards, Hagibis made landfall near Shantou in the afternoon on 15 June and weakened into a tropical depression that night. Affected by the rainbands of Hagibis, local weather was cloudy with some showers on 15 June.
A southwest monsoon then maintained generally hot weather with sunny periods and thundery showers over the next five days. As another trough of low pressure lingered along the south China coast, the weather in Hong Kong became even more unsettled with occasional heavy showers and squally thunderstorms from 21 to 25 June. The showers were particularly heavy on the morning of 22 June. Rainfall exceeded 70 millimetres over widespread areas and more than 150 millimetres were recorded at Lamma Island, Cheung Chau, the eastern part of Lantau Island and the western part of Hong Kong Island.
With an anticyclone aloft establishing over southern China, sunny and very hot weather returned from 26 to 28 June. Temperatures recorded at the Hong Kong Observatory rose to a maximum of 33.7 degrees on 27 June, the highest of the month. Affected by a broad trough of low pressure over the coast of Guangdong and the northern part of the South China Sea, there were sunny periods with a few showers and isolated thunderstorms on the last two days of the month.