Indian Seasons (Shad Ritu)
The Hindu calendar divides the year into six seasons of about two months each, rather than the four used in Western reckoning.
Vasant Ritu
Spring
Mid-March – Mid-May · Chaitra – Vaishakha
Considered the king of seasons (Ritu Raja). Mild temperatures, blossoming trees and festivals like Holi and Ugadi mark this transition out of winter.
Grishma Ritu
Summer
Mid-May – Mid-July · Jyeshtha – Ashadha
The hottest stretch of the year across most of India, with peak daytime temperatures and long daylight hours leading up to the monsoon.
Varsha Ritu
Monsoon
Mid-July – Mid-September · Shravana – Bhadrapada
The south-west monsoon brings the year's main rainfall. Many vrats and the Chaturmas period of reduced activity for sannyasis begin in this season.
Sharad Ritu
Autumn
Mid-September – Mid-November · Ashwin – Kartik
Clear post-monsoon skies and cooling nights. The festival-heavy season of Navratri, Durga Puja and Diwali falls here.
Hemant Ritu
Pre-Winter
Mid-November – Mid-January · Margashirsha – Pausha
Early winter with crisp mornings and the shortest days of the year, culminating around the winter solstice (Makar Sankranti follows soon after).
Shishir Ritu
Winter
Mid-January – Mid-March · Magha – Phalguna
The coldest season in most of North India, gradually warming toward spring; ends with Holika Dahan and the arrival of Vasant Ritu.