The wind blowing in the northern plains in summers is known as:

The correct answer is Loo.

Key Points

The summer months are a period of excessive heat and falling air pressure in the northern half of the country. Dust storms in the evening are very common during May in Punjab, Haryana, Eastern Rajasthan and Uttar Pradesh.

Some of the Famous Local Storms of Hot Weather Season are as follows:

• Loo is the hot and dry winds blow in the Northern plains from Punjab to Bihar with higher intensity between Delhi and Patna.
• Blossom Shower- This is seen mainly in Kerala. With this shower, coffee flowers blossom in Kerala.
• Mango Shower- It occurs mainly in Kerala and the coastal areas of Karnataka. It happens towards the end of summer. Locally they are called Mango showers as they help in the early ripening of mangoes.
• Kalbaisakhi- It occurs mainly in Bengal and Assam. It is often considered as dreaded evening thunderstorms. 

From the above, it is clear that Hot and dry winds blowing during the summer months in the Northern Plains are called Loo.