Zhuhai is situated from 21 degrees 48 minutes to 22 degrees 27 minute of north latitude and 113 degrees 3 minutes to 114 degrees 18 minutes east longitude, which is a subtropical monsoon regions at low latitudes. The region features plentiful sunshine and rainfalls, with an annual average temperature of 22.4 degrees C. The lowest temperature appears in January and February, and the temperature gradually rises from April. The months from May to September see warm and rainy weathers. The annual average rainfall is 1700—2300mm. The constant wind direction is from the east wind, and the prevailing wind in summer is the SE wind while the prevailing wind in winter is the NE wind. Typhoon attacks are common occurrences in summer and autumn. The average RH of the air is 79%.