Sikkim is located in the northeastern part of the country, in the eastern Himalayas. It is one of the smallest states in India. Sikkim is bordered by the Tibet Autonomous Region of China to the north and northeast, by Bhutan to the southeast, by the state of West Bengal to the south, and by Nepal to the west.
Sikkim is a basin surrounded on three sides by precipitous mountain walls. There is little lowland, and the variation in relief is extreme. Within a stretch of roughly 50 miles (80 km), the land rises from an elevation of about 750 feet (225 metres) in the Tista River valley to nearly 28,200 feet (8,600 metres) at Kanchenjunga, India’s highest peak and the world’s third highest mountain.
Sikkim exhibits a variety of climatic types, from almost tropical conditions in the south to severe mountain climates in the north. In Gangtok, temperatures in January (the coldest month) drop into the low 30s F (about 0 °C); in August (the warmest month), temperatures may reach the low 80s F (about 28 °C).
About one-fifth of the population consists of Scheduled Tribes (an official category embracing indigenous peoples who fall outside the predominant Indian social hierarchy). The most prominent of these tribal groups are the Bhutia, the Lepcha, and the Limbu.
(Video credit to TNT https://www.youtube.com/watch?v=EQUM5QlZTGk&t=29s)