Most parts of the Republic of the Philippines are in mountainous regions, plateaus and hills. The northern part of the Philippines enjoys a tropical marine monsoon climate, while the southern part of the Philippines enjoys a tropical rainy climate. The average annual temperature is 27℃. The Philippines has high temperature, high humidity level and abundant rainfall. There is frequent Typhoon in the northern part. There are three seasons in the Philippines, including the cool season, the dry season and the rainy season. However, the difference between the seasons is not obvious. In the rainy season, the average temperature ranges from 24 to 28℃. The annual average temperature is 27℃ with the annual precipitation ranging from 2,000 to 3,000 mm. Due to the monsoon and the complicated landform, the climate in different parts of the same island is different from each other. The cool season lasts from December to February of the following year. During this season, the weather is relatively cool and there is less rain, which is the best time for tourists to visit the Philippines. January is the coolest month with the average temperature of 25.5℃. May is the hottest month of a year with the average temperature of 28℃.