According to Koppen’s climatic classi¬fications of India, Great Northern Plains are represented by

According to Köppen's climatic classification, the Great Northern Plains of India are represented by the Cwg climate type. This classification denotes a 'Humid Subtropical Climate' characterized by a dry winter season. The 'C' represents a mild temperate/mesothermal climate where the coldest month's temperature is between -3°C and 18°C, 'w' indicates that the winter is dry, and 'g' refers to the Ganges type, where the maximum temperature occurs before the summer solstice and the rainy season [4]. This region, also known as the Indo-Gangetic Plains, experiences high temperature variations and receives most of its rainfall during the southwest monsoon. In contrast, Aw represents tropical savanna found in Peninsular India, Amw represents the tropical monsoon climate of the Malabar Coast, and As represents the tropical dry summer climate of the Coromandel Coast [1].

Sources

1. [2] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 30: Climatic Regions > Climatic Groups According to Koppen > p. 421
2. [4] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 4: Climate of India > Table 4.2 > p. 34
3. [1] https://en.wikipedia.org/wiki/Climate_of_India