Most of the Indian Peninsula will be grouped according to Koeppen’s system under:

• Koeppen recognised five major climatic groups, four of which are based on temperature and one on precipitation.
• The capital letters: A, C, D and E delineate humid climates and B dry climates.
• The climatic groups are subdivided into types, designated by small letters, based on the seasonality of precipitation and temperature characteristics.
• The seasons of dryness are indicated by the small letters: f, m, w and s, where f corresponds to no dry season, m - monsoon climate, w- winter dry season and s - summer dry season.
• The small letters a, b, c and d refer to the degree of severity of temperature.
• The B- Dry Climates are subdivided using the capital letters S for steppe or semi-arid and W for deserts.​

Climatic Regions of India According to Koppen’s Scheme:

Tropical Wet Climate (Af):

• A tropical wet climate is found near the equator.
• A significant amount of rainfall occurs every month of the year as thundershowers in the afternoon.
• The temperature is uniformly high and the annual range of temperature is negligible.
• The maximum temperature on any day is around 30°C while the minimum temperature is around 20°C.
• Tropical evergreen forests with dense canopy cover and large biodiversity are found in this climate.
• The major areas are the Amazon Basin in South America, western equatorial Africa and the islands of the East Indies.

​Subtropical steppe (BSh):

• Located in the transition zone between humid and dry climates.
• The subtropical steppe receives slightly more rainfall than the desert, adequate enough for the growth of sparse grasslands.
• The rainfall is highly variable.
• The variability in the rainfall affects life in the steppe much more than in the desert, more often causing famine.
• Rain occurs in short intense thundershowers in deserts and is ineffective in building soil moisture.
• The annual and diurnal ranges of temperature are also high. 

​Marine West Coast Climate (Cfb):

• Marine west coast climate is located poleward from the Mediterranean climate on the west coast of the continents.
• The main areas are Northwestern Europe, the west coast of North America, the north of California, southern Chile, southeastern Australia and New Zealand.
• Due to marine influence, the temperature is moderate and in winter, it is warmer than for its latitude.
• The mean temperature in summer months ranges from 15°-20°C and in winter 4°-10°C.
• The annual and daily ranges of temperature are small.
• Precipitation occurs throughout the year.

Tropical monsoon climate (Am):

• It is found over the Indian sub-continent, North Eastern part of South America and Northern Australia.
• Heavy rainfall occurs mostly in summer.
• Winter is dry.

Thus, most of the Indian Peninsula will be grouped under "Am" according to Koeppen’s system.