Prachuap Khiri Khan has a tropical savanna climate (Koppen climate classification Aw). Seasons are not as distinct as in more northerly parts of Thailand; temperatures are quite similar throughout the year and the dry and wet seasons are not as clearly defined, with appreciable rain falling in all months. However, in general the months from December to April are drier with about 45 millimetres (1.8 in) in each month, while October and November are the wettest months with over 200 millimetres (7.9 in) each. The other months, from May to September, have an intermediate level of rainfall around 100 millimetres (3.9 in).