Narsingh temple, dedicated to the 4th Avatar of Lord Vishnu is said to have built in 8th century by Adi Shankaracharya.
Lord Narsimha, who is represented in the form of half lion and half human. Located in the lower parts of the lower bazaar region of the town of Joshimath, this temple attracts a huge throng of Vaishnavites and pilgrims from across India looking to offer their Darshan at this holy temple.
During the winter months when the temple of Badri Vishal shuts down for a period of 6months, the idol of the presiding deity of Lord Badri is shifted to this temple at joshimath.
Being located in the hilly regions the temple should be visited during the comfortable summer times of April and May. Travelling to hilly regions should be avoided during the monsoon months of July and August since the entire area remains susceptible to unexpected weather changes. You can also visit this place during the winter months of October and November when the idol of Lord Badri is brought down to this temple which is his winter home. The remainder of the months is uncomfortably cold to visit this region.
Source: euttaranchal