Nirjuli is a town in the Papum Pare district of Arunachal Pradesh in Northeast India. It is 19 km away from Itanagar, the capital of Arunachal Pradesh, and it takes about 40–45 minutes by road from Nirjuli to Itanagar. The National Highway 52A is a highway that runs through the town and provides the primary platform for easy transportation and access within the town and to the outside World as well. The River Dikrong, the only river flowing through the town, adds to its exquisite beauty, and ultimately flows into the Brahmaputra River.
It is 10 km away from Banderdewa, the border between Assam and Arunachal Pradesh and it takes about 30 minutes by road from Banderdewa to Nirjuli following the NH 52A which originates from Banderdewa itself. The railway transportation project which will soon connect Nirjuli and Guwahati is under construction.
A warm but pleasant climate prevails in Nirjuli all through the year. Post Monsoon, winter and spring (October to April) are marked with cool climates, especially winter months. During this season temperature ranges between 22°C to 15°C. Summer during May to June and monsoon season during July to September are also pleasant. It receives heavy showers about 2,000 to 4,000 mm between the months of May and September yearly. Monsoon temperature oscillates between 30°C to 18°C. Summer temperature can soar up to 40°C some days. Breezes from Himalayan ranges make the winter climate freezing cool.
Mopin is celebrated by the galo tribe in Arunachal Pradesh. A local drink called Apo (an alcoholic beverage popular in this state prepared by fermentation of rice) is generally distributed among the participants in a bamboo shoot. Like in Indian festival of Holi, revelers apply rice flour to fellow revelers' faces. Participants perform local traditional dances at this event.
The Nyishi people who form the major part of the local tribal population in Nirjuli celebrate Nyokum annually. They serve local drink called Apung made by fermentation of rice. It is celebrated with great zeal and passion. The people of Arunachal have their own marriage customs. During marriages, the bride's family is shown respect by presenting mithun, the state animal of Arunachal Pradesh.
Tourism in Nirjuli is not as lucrative as other districts in Arunachal Pradesh. Horticulture too has a great influence on the economy of the town. The climate and topography of Nirjuli is conducive to horticultural products like ginger, spices, bamboo, cardamom and mushroom, aromatic and medicinal plants. The livestocks are the sources of milk, meat, manure, egg; thus contributing to the family as well as economy. In recent years, pisciculture has also become an important source of employment and income in Nirjuli.