Information from the Statistics and Census Service (DSEC) indicated that the annual mean air temperature in Macao rose by 0.8ºC year-on-year to 23.6ºC in 2019, marking the warmest year since records began in 1952. The highest temperature of the year was 35.7ºC in July and August, down slightly by 0.1ºC compared to the highest value in 2018; the lowest temperature was recorded at 8.4ºC in January, up by 3.8ºC. Total precipitation was 2,248.0mm, an increase of 452.4mm year-on-year.
There were 5 tropical cyclones in 2019. Tropical cyclone signal no.8 was hoisted when tropical storm Wipha hit Macao; a maximum gust of 100.1km per hour and a maximum 10-minute average wind speed of 67.3km per hour were recorded.
As regards air quality, number of "Poor" air quality days recorded by each monitoring station in Macao in 2019 surpassed the 2018 figure; the roadside monitoring station at Ká-Hó and the ambient monitoring station in Taipa both registered the highest number, at 41 days, with respective year-on-year increases of 29 days and 12 days. In terms of fine suspended particulates (PM2.5), all monitoring stations recorded the maximum PM2.5 value of the year in January, with the monitoring station in the high density residential area in Taipa showing 6 exceedance days throughout the year.
Total water consumption was 92,815,000m3, up by 2.1% year-on-year. Water consumption by the business sector (47,739,000m3), households (39,152,000m3) and the government sector (5,924,000m3) increased by 1.8%, 2.3% and 2.8% respectively year-on-year. The Waste Water Treatment Plants treated an average of 223,413m3 of waste water per day.
The Refuse Incineration Plant treated a total of 550,249 tonnes of municipal solid waste, an increase of 5.3% year-on-year. Besides, volume of construction waste sent to landfill rose by 19.1% to 2,394,000m3.
The land area of Macao measured 32.9km2. The population density went up from 20,000 persons per km2 in 2018 to 20,400 persons per km2 in 2019.