Class 7 Social Science Chapter 3: Climates of India Notes

What is this chapter about?

The chapter opens with an old Sanskrit verse, a subhashita, that prays for timely rain and an Earth rich with crops. Rain at the right time has always mattered in India. The chapter explains what climate is, why India has so many climates, how the monsoon works, how climate shapes our lives, and how disasters and climate change are linked to it.

Weather, seasons and climate

People often say climate when they mean weather. Weather is what we feel from one hour or day to the next, and it keeps changing. Climate is the pattern of weather a region has over a long time, several decades at least, and it differs from region to region. Seasons sit in between: each lasts a few months and recurs every year, so they are linked to both. Across most of the world there are four main seasons, but India also has a rainy season, the monsoon. Traditionally the year has six ritus: vasanta (spring), grishma (summer), varsha (rainy season), sharad (autumn), hemanta (pre-winter) and shishir (winter), with festivals such as Vasanta Panchami and Sharad Purnima. Crops, food, clothes, flowering trees and even animal fur change with them.

Types of climates in India

India’s climate is as diverse as its land. The high Himalayas are alpine: winters there are cold and snowy, summers cool, while the lower Himalayas and other hills are temperate, which is why hill stations draw people escaping the heat. The northern plains are subtropical, with scorching summers and cold winters, and grow most of India’s wheat. The Thar Desert is arid: very hot days, cool nights and little rain. The western coastal strip is tropical wet, good for rice and spices; the Deccan Plateau is semi-arid; and eastern India and the southern peninsula are tropical, with wet and dry periods set by the monsoon winds.

What shapes a climate

Five factors work together. Latitude: near the Equator the Sun’s rays fall almost straight and concentrate their heat, so Kanniyakumari is warm all year while Srinagar is much cooler. Altitude: the air cools as height rises. Nearness to the sea: the sea moderates temperature, so coastal places have mild summers and winters. Winds carry heat, cold or moisture. Topography: mountains block or lift winds. A small area can even have its own microclimate, like a city that traps heat. Read more in factors that shape climate.

The monsoons

The word monsoon comes from the Arabic mausim, season. In summer the Asian landmass heats up faster than the ocean, a low-pressure area forms over it, and moist winds blow in from the sea and drop heavy rain. In winter the land cools faster and the winds reverse. The southwest monsoon reaches India’s southern tip at the start of June and covers the whole country by mid-July, soaking the western slopes of the Western Ghats. The northeast monsoon of winter is mostly dry, but brings rain to parts of east and south India. Mawsynram in Meghalaya gets about 11,000 mm of rain a year, more on average than anywhere else on Earth. Read the monsoons.

Climate and our lives

Many festivals, from Baisakhi and Onam to Bihu and Pongal, follow the seasons and the harvest, and ragas such as Meghamalhar celebrate the rains. People have long read nature’s signs: Konkan fishermen expect the monsoon when fish rise to the surface. The climate also drives the economy. When the monsoon fails, crops suffer, water runs short, labourers move to cities and food prices rise.

Climates and disasters

India’s weather can turn extreme. Cyclones strike the coasts, especially the eastern coast; floods hit Assam, Bihar, Uttar Pradesh, Kerala and Andhra Pradesh, and glacial bursts strike the Himalayas; landslides are common in the hills during the monsoon; and forest fires spread in dry, windy weather. Human actions, such as cutting forests and building carelessly, often make them worse. Read climate disasters and climate change.

Climate change

Climate change means significant, long-term changes in temperature, rainfall and weather events. In the distant past natural processes drove it, but since the 19th century human activities, above all burning fossil fuels, have released large amounts of greenhouse gases that trap extra heat and cause rapid global warming. Early in 2025, India was 1 to 3°C warmer than normal, which cut the winter short and kept it mild. Governments promote mitigation, such as cutting emissions, planting trees and using renewable energy, and communities build resilience.

Before we move on

India’s climate is shaped by its geography, the monsoon is vital to farming and livelihoods, and understanding climate helps us prepare for disasters and a warming world. Answers to the Big Questions, every Let’s Explore and all seven questions and activities are in the NCERT solutions for Chapter 3.