Sikkim experiences a varied climate depending on the altitude. However, the best time to visit is between March and June (spring to early summer) and September to December (autumn and early winter).
Spring (March to June): The weather is pleasant, with clear skies and blooming flowers. This is perfect for sightseeing, trekking, and outdoor activities.
Autumn (September to December... https://www.blogger.com/blog/post/edit/5142106134530763227/2965929782548280471