Hong Kong saw a mean temperature of 25.6 degrees Celsius in May, close to the 25.8-degree normal figure, with a highly uneven rainfall distribution, the Hong Kong Observatory said on Wednesday.

Total rainfall in the month was 176.6 mm, 54 percent of the normal figure. The accumulated rainfall so far this year was 410.7 mm, about 38 percent below normal.

Affected by a trough of low pressure, the weather became cloudy with showers on May 6 and deteriorated further with heavy rain and squally thunderstorms May 7.

A moist maritime airstream brought hot weather to Hong Kong on May 21, with the temperature rising to a maximum of 30.7 degrees, the highest of the month.