Sikkim's climate varies from the tropical heat in the valleys to
Alpine cold in the higher altitudes. The Tropical climate prevails in the
deep valleys with elevation up to 5000 ft . The temperate climate zone
comprises areas having elevations between 5000 ft and 13000 ft.
Above 13000 ft are the Alpine climate Zones reaching upto 16000 ft which marks the
beginning of the perpetually snow-bound
Sikkim is a region of heavy rainfall.
On an average, Sikkim
receives 125 cm rain. But the rainfall varies widely between various regions
like sheltered valleys, foot hills and high mountains .