Geography of Thailand political development of this region. International access through the Andaman Sea and the Gulf of Thailand made the south a crossroads for both Theravada Buddhism, centered at Nakhon Si Thammarat, and Islam, especially in the former Pattani Kingdom on the border with Malaysia. Thailand's regions are divided politically into a total of 76 provinces plus Bangkok, which is a special administrative area. Thailand's climate is influenced by monsoon winds that have a seasonal character (the southwest and northeast monsoon). The southwest monsoon, which starts from May until October is characterized by movement of warm, moist air from the Indian Ocean
Northern Thailand upper-central-region provinces: Kamphaeng Phet, Nakhon Sawan, Phetchabun, Phichit, Phitsanulok, Sukhothai, Uthai Thani and Tak, bringing the total to 17 provinces. According to the six-region classification system established by the National Research Council of Thailand, the northern region includes the following provinces: Note: Populations as of 31 December 2011. Northern Thailand Northern Thailand is geographically characterised by several mountain ranges, which continue from the Shan Hills in bordering Myanmar to Laos, and the river valleys which cut through them. Though like most of Thailand, it has a tropical savanna climate, its relatively high elevation and latitude contribute to more pronounced seasonal