In addition to being the largest city, Bangkok has the distinction of being the capital of Thailand as well as the chief seaport. Dominating Thailand's terrain are mountainous areas, which can be found all through the country. Taking up a third of Thailand is the Khorat Plateau, a flat, barren plateau that borders the Mekong River valley. The main river in Thailand, Chao Phraya, goes through an alluvial plain that is sandwiched between the central and western mountains. This plain, along with a fertile delta near Bangkok, which was created by the Chao Phraya, is the most productive agricultural part of Thailand, and is the most densely populated.
Monsoon winds have an impact on Thailand's tropical climate.
Rainfall is more likely during the summer months of June through October, and the average rainfall varies from region to region. In the northern, central and western regions, about 1500 mm is expected, while the Thai section of the Malay peninsula usually gets over 2500 mm. The Khorat Plateau gets the least rainfall with about 1270 mm or less per year. AsianInfo.org - All Rights Reserved.