Places like Leh, Srinagar, Jibhi, Manali, Recong Peo, Auli, Almora, Nainital, Chandrashilla, Tunganath, and Mussoorie are some of the top off-season destinations that you can visit in January in North India.
Manali, Shimla, Kufri are just overrated places. If you want to enjoy the beautiful view of valley and want peace.I suggest you to go Kalga village (Kheerganga) it is a remote area, it can be easily reachable. For more details check out my blog (winter trek to kheerganga).