Climate
The climate of the three states is quite diverse, reflecting their differing geographical make-ups.

In Arunachal Pradesh climate varies enormously according to altitude. Areas in the highest altitudes enjoy an alpine climate, in the Middle Himalayas the climate is temperate, and at a level closer to sea-level, a sub-tropical climate is experienced. Most rain in the region falls between May and September.

Assam is a temperate region characterised by hot summers (temperatures can reach as high as 40°C), followed by heavy rains (peaking in June), and mild winters.

Meghalaya is more moderate in terms of temperature (temperatures rarely exceed 30°C), but extremely wet in the rainy eason (from May to September), resulting in some spectacular year round waterfalls. In fact Meghalaya boasts two places, Cherapunjee (Sohra) and Mawsynram, that vie with each other for the title of the wettest place on earth.