Is tropical and characterized by monsoons. There is a rainy, warm, and cloudy southwest monsoon from mid-May to September, as well as a dry, cool northeast monsoon from November to mid-March. The southern isthmus is always hot and humid. Major cities beside the capital Bangkok include Nakhon Ratchasima, Khon Kaen, Udon Thani, Ubon Ratchathani, Nakhon Sawan, Chiang Mai, Phitsanulok, Surat Thani, Phuket and Hat Yai.