In Haryana, about 80% of the annual rainfall occurs during the monsoon season.


The monsoon season in Haryana typically lasts from June to September. During this period, the southwest monsoon winds bring moisture-laden clouds from the Arabian Sea and Bay of Bengal, resulting in rainfall across the region.


Several factors contribute to the distribution of rainfall throughout the year in Haryana, including:

- Topography: Haryana is a landlocked state with diverse topography. The presence of the Aravalli Hills in the southern part of the state influences the movement of monsoon winds and their interaction with the region's landscape.
- Monsoon Winds: The southwest monsoon winds play a crucial role in determining the timing and intensity of rainfall in Haryana. These winds bring moisture and precipitation to the region during the monsoon season.
- Temperature and Humidity: Haryana experiences hot and dry weather conditions in the summer months, which creates a thermal low-pressure zone. This, coupled with high humidity, creates favorable conditions for the formation of rain-bearing clouds during the monsoon season.
- Weather Systems: The interaction of monsoon winds with various weather systems, such as low-pressure areas and cyclonic circulations, also influences the distribution of rainfall in Haryana.


During the monsoon season, Haryana receives a significant portion of its annual rainfall. This is primarily due to the southwest monsoon winds, which bring moisture and precipitation to the region. The monsoon rainfall in Haryana is crucial for agricultural activities, as it provides water for irrigation and supports crop growth.


In conclusion, about 80% of the annual rainfall in Haryana occurs during the monsoon season. The monsoon winds, topography, temperature, humidity, and various weather systems contribute to the distribution of rainfall throughout the year in the region.