The climate of the park is tropical montane. Though, latitude-wise, the park falls in the tropics, it exhibits extra tropical climate owing to the altitudinal influence. This change in the bio-climate and geological stability is said to be important for the endemic species in the habitat.
The park receives heavy rainfall and the average annual rainfall is 3000mm. Heavy rains occur during the South-West monsoon and January-March are relatively dry months. In winter, the temperature may even go below the freezing level.