Annapurna Circuit Trek is generally taken in the months of February, March, April, May, late September, October, November, and December. You can say Spring and Autumn. During this time of the year, the weather is in its best condition in these regions. Spring and Autumn are also the peak season for trekking in Nepal as well. The climate will be neither hot nor cold, the sky will be clear & bright, and the views are prominent. Likewise, the forests and hills get bloomed up with colourful wildflowers.