Hi Niteesh, The peak tourism season is the winter season. The best time to visit Mount Abu is from November to June. Attached with my comments you can check curated trips by fellow travelers. Please take a look. Thanks!
The best season to visit Mount Abu is monsoon as the lush greenery is all around making the place more pleasant and the weather being just perfect for a tour of a hill station. Another good time to visit Mount Abu is from November to March as the temperature is very low making an ideal time for couples to visit.