Satun is a town in southern Thailand, capital of the Satun province. It covers the whole tambon Phiman of Mueang Satun. Satun lies 985 k…Satun is a town in southern Thailand, capital of the Satun province. It covers the whole tambon Phiman of Mueang Satun. Satun lies 985 km south of Bangkok. As of 2005 it has a population of 21,498. Satun has a tropical monsoon climate with a short dry season in January and February and a prolonged wet season running from March to December. The highest monthly rainfall occurs in September and October with average monthly rainfall above 320 mm. The average annual high temperature in Satun is 32.6 °C and the average annual low temperature is 23.7 °C.