Macau Yearbook 2013 - Macao Yearbook

Geography, Environment and PopulationAs for storm surge warning, three yellow storm surge warnings and two red storm surge warningswere issued during 2012.Tropical CycloneWarningSummary of Severe Weather Warnings Issued in 2012Warning / Signal TypeFrequencyNo. of WarningReports IssuedNo. 1 Alert Signal 5 39No. 3 Strong Wind Signal 6 19No. 8 Northeast Gale Signal 1 9No. 8 Southeast Gale Signal 3 20No. 8 Southwest Gale Signal 0 0No. 8 Northwest Gale Signal 0 0No. 9 Increasing Gale Signal 1 3All Signals Lowered 5 5Strong Monsoon Warning (Black Ball) 17 47Rainstorm Warning 3 8Thunderstorm Warning 72 184Storm Surge Warning 3 18TemperaturesMacao had an average annual temperature of 22.3ºC during 2012, which was close to normal.The highest and the lowest average temperature were 28.6ºC in August and 13.0ºC in January,respectively. The hottest day was 21 July, when the temperature rose to 36.1ºC; whereas the coldestday was 25 January, when the temperature fell to just 5.0ºC.Relative HumidityThe average relative humidity during 2012 was 80 percent, which was close to the climate normal.April saw the highest monthly average relative humidity, at 88 percent; whereas the lowest was70 percent in October.RainfallTotal rainfall during 2012 was 1,556.0 millimetres, which was 502.1 millimetres or 24 percent lessthan climate normal. The highest monthly rainfall was recorded in July at 394.4 millimetres, 97.0387