The main variable of Malaysia΄s climate is not temperature or air pressure, but rainfall. In general, the climate of Malaysia can be described as typical tropical climate, with the coastal plains averaging 28°C, the inland and mountain areas averaging 26°C, and the higher mountain regions, 23°C. The area's relative humidity is quite high, and ranges between 70 and 90 percent.
Malaysia has extreme variations in rainfall that are linked with the monsoons. Generally speaking, there is a dry season (June to September), and a rainy season (December to March). Western and northern parts of Malaysia experiences the most precipitation, since the north- and westward-moving monsoon clouds are heavy with moisture by the time they reach these more distant regions.
Typhoons can sometimes hit Malaysia from July to mid November, and can cause heavy damage, flooding and erosion.
Lightweight cotton clothing is advised throughout the year, with an umbrella or raincoat for sudden cloudbursts. No matter where you go, be prepared for high temperatures and humidity.
The Climate of Malaysia can be classified as Af climate, a hot, humid tropical climate with all months above 18°C.