Pasighat experiences a humid subtropical climate (Köppen climate classification *Cwa/Cfa*), strongly influenced by the South-West Monsoon. The region is famous for receiving some of the highest rainfall in Arunachal Pradesh.
* **Summer/Monsoon (May to September):** Summers are warm and highly humid. The monsoon brings torrential rainfall, often leading to localized flooding and landslides in the surrounding hills. Average highs range from 30°C to 34°C. * **Winter (November to February):** Winters are mild, dry, and highly pleasant. Temperatures generally range from 10°C to 22°C. Snowfall does not occur in the city, though distant high-altitude peaks may be snow-capped. * **Best Time to Visit:** The ideal time to visit Pasighat is during the winter and early spring months (October to April) when the weather is cool, dry, and clear, perfect for river rafting and sightseeing.