When is the best time to do Annapurna Base Camp trekking? Annapurna Base Camp can actually be done any time in the year. However, the monsoon is not a good time. Rain mostly comes down during the evening or night but the dark clouds are ever present. This means bad to no view of the beautiful peaks. It also means leeches, mosquitoes, possible landslides and slippery roads. But, this is the time when animals are most active. If you are a keen biologist, then maybe monsoon is for you. First, here are the seasons. In Nepal, there are six seasons but it translates as: Spring (March to May) Summer/Monsoon (June to August) Autumn (September to November) Winter (December to February) Autumn is the best time to do this trek. Autumn is a dry season that offers clear blue sky and moderate temperature. This is the best time do any trek in Nepal and is, therefore, very crowded. You could go during December if you would like it to be quieter. ABC can be done in w