Which is the Least Rainy State in India? List of Top 7 States

Do you know that although Mawsynram in Meghalaya receives more than 11,800 mm of rain annually, there are areas in India where rain in any form on two consecutive days calls for celebration? It seems unbelievable, but the geography of India is responsible for creating such disparities.

While certain areas of the country do not receive as much precipitation during a whole year as a tropical hill station receives in an intense rain shower in one day.

There comes the interesting part – such areas that used to be a wasteland are now going to become India’s largest green energy centres, thanks to endless sunshine that will help generate electricity for millions of households. Let us look closer at India’s driest states.

Which is the Least Rainy State in India?

Rajasthan holds the distinction of being the state in India with the lowest amount of rainfall. This comes from the statistics provided by the IMD and the Ministry of Earth Sciences of India, which have been collected over many years.

Rajasthan as a whole receives a rainfall of between 300 mm and 550 mm every year; the western regions of Jaisalmer, Barmer, and Bikaner are extremely dry areas. Western Rajasthan receives an annual rainfall of less than 150 mm to 300 mm.

When considering Union Territories along with states, the driest region in the entire nation will be Ladakh, with Leh in Ladakh receiving an annual precipitation of only 100 mm.

The main cause for very little rainfall in the state of Rajasthan is associated with the wind and the mountains. During the monsoon period, moist winds move across India.

But since the Aravalli Mountains run parallel to the monsoon winds blowing from the Arabian Sea, they allow the moist clouds to pass through rather than blocking them and causing them to produce rain.

In addition, the monsoon winds blowing from the Bay of Bengal lose almost all their moisture before reaching Western Rajasthan.

List of 7 Low Rainfall States in India

To know about the variation in rainfall in the dry areas of the country, the following information regarding the IMD’s rainfall data for several years is provided:

Rajasthan: The Driest State in India

Rajasthan holds the top position on the list of driest Indian states. It occupies a massive geographical area, but a huge portion of it is covered by the Thar Desert.

What Makes Rajasthan So Dry?

There are two major atmospheric conditions that lead to the formation of the arid climate in Rajasthan:

• The Parallel Arrangement of the Aravalli Range: When the southwestern monsoon through the Arabian Sea enters India, it comes face-to-face with the Aravalli range. 
• Since the mountains have a parallel arrangement to the direction of the wind, they are unable to block moisture-laden clouds. 
• The clouds just sail over the mountains towards the north of India without cooling to form rain.
• The Loss of Moisture Due to the Eastern Branch of the Monsoon: The eastern branch of the monsoon moves all the way through the Gangetic plains to reach western Rajasthan.

Ladakh: The High-Altitude Cold Desert

Even though Ladakh is not a State but a Union Territory, it cannot be ignored when talking about dry regions in India. The Leh district, along with Kargil, receives some of the lowest rainfall figures recorded on Earth.

What Makes Ladakh So Dry?

• The Himalayan Rain Shadow Effect: The Great Himalayan Range becomes an obstacle for any cloud trying to make its way from the Indian plainlands towards the north. Thus, they release all their water content on the south slope while leaving Ladakh without rain.
• Freezing Temperatures and High Altitudes: Being located more than 3,000 meters above sea level, Ladakh gets freezing temperatures due to low humidity levels in the air. Precipitation received by the area falls in the form of snow during the winter.