Like most of the popular treks in Nepal, Khopra Ridge trek during the spring (March to May) and fall (September to November) is considered the best time around with moderate temperature and clean weather. During the hot pre-monsoon season in late May-June, things get uncomfortable and humid. The trails become muddy and slippery and the landscapes are distorted by thick fogs. Winter season during the months between mid-November and February can get really cold with heavy snowfall.