Naharlagun is at an altitude of 155 metres from sea level. Surrounded by mountains, Naharlagun is a city which sees annual long monsoon rains. The weather is sub-tropical, with hot and humid summer and temperate winter. With its Heli service connecting Guwahati and Railway Station connecting to Guwahati & other major Indian cities, Naharlagun has become gateway to Arunachal Pradesh. It has quite a few interesting places to visit.