The state has a tropical savanna climate, designated Aw under the Köppen climate classification. The undulating topography leads to local variations, particularly in the hill ranges. The four main seasons are winter, from December to February; pre-monsoon or summer, from March to April; monsoon, from May to September; and post-monsoon, from October to November. During the monsoon season, the south west monsoon brings heavy rains, which cause frequent floods. The average annual rainfall between 1995 and 2006 ranged from 1,979.6 to 2,745.9 mm (77.94 to 108.11 in). During winter, temperatures range from 13 to 27 °C (55 to 81 °F), while in the summer they fall between 24 and 36 °C (75 and 97 °F). According to a United Nations Development Programme report, the state lies in "very high damage risk" zone from wind and cyclones
