India’s climate is called monsoonal. But this one word hides huge differences across the country.
Rajasthan can hit 55°C in summer. Leh can drop to minus 45°C in winter. Both places are still “monsoonal” India.
MCQ Questions🏛️ Must Know
India’s Four Seasons
- Cold Weather This season runs roughly December to February. North India stays cold and dry, while the Peninsula has almost no real winter at all.(NCERT 11)
- Hot Weather This season runs March to May. Temperatures climb steadily, reaching around 48°C in parts of the northwest by May.(NCERT 11)
- Southwest Monsoon This season runs June to September. It brings most of India’s yearly rain, arriving over Kerala by 1 June and reaching Mumbai and Kolkata around 10-13 June.(NCERT 11)
- Retreating Monsoon This season runs October to November. Rain shifts away from the north, and instead falls heavily on the Tamil Nadu coast.(NCERT 11)
What Controls India’s Climate
- Latitude The Tropic of Cancer cuts India in half. The south stays warm all year, while the north sees much bigger swings in temperature.(NCERT 11)
- The Himalayas This mountain wall blocks cold winds blowing down from Central Asia. It also traps monsoon winds, forcing them to drop their rain inside the subcontinent.(NCERT 11)
- Distance from the Sea Coastal areas like Mumbai barely feel any seasonal extremes. Inland cities like Delhi and Amritsar swing between very hot and very cold.(NCERT 11)
- Altitude and Relief Height cools the air, so Darjiling stays far colder than Agra even on the same latitude. Mountains also decide rainfall: windward slopes get heavy rain, while the leeward side stays dry.(NCERT 11)
📘 Good to Know
ITCZ and the Monsoon’s Two Branches
- ITCZ The Inter-Tropical Convergence Zone is a low-pressure belt where trade winds meet. In July it shifts north over the Gangetic plain, pulling in the monsoon.(NCERT 11)
- Two Branches The monsoon reaches India as two separate branches: one from the Arabian Sea, one from the Bay of Bengal.(NCERT 11)
- Arabian Sea Branch This branch itself splits three ways. One part hits the Western Ghats head-on, dumping 250-400 cm of rain on the windward side. A second part follows the Narmada-Tapi valleys inland. A third crosses Saurashtra and Kachchh, then fades over the Aravallis.(NCERT 11)
- Bay of Bengal Branch This branch strikes Myanmar’s coast first, then bends back into India. It splits again: one part moves west along the Ganga plains, the other climbs the Brahmaputra valley and slams into the Khasi and Garo hills.(NCERT 11)
- Break in the Monsoon Rain can stop for a week or more even during the rainy season. This dry spell is called a “break,” and it happens for different reasons on the west coast versus the north.(NCERT 11)
Test Yourself
🌟 Great to Know
Local Storms and Traditional Seasons
- Mango Shower Pre-monsoon rain hits Kerala and coastal Karnataka in late summer. Locals call it the mango shower, since it helps mangoes ripen early.(NCERT 11)
- Blossom Shower This is a similar pre-monsoon shower in Kerala. It triggers coffee flowers to blossom.(NCERT 11)
- Nor’westers These are violent evening thunderstorms in Bengal and Assam. Bengal calls them “Kalbaisakhi,” and Assam calls the same storm “Bardoisila.”(NCERT 11)
- Loo This is a hot, dry wind that blows across the northern plains in summer, from Punjab down to Bihar. It is strongest between Delhi and Patna, often lasting into the night.(NCERT 11)
- Six Traditional Seasons Indian tradition splits the year into six two-month seasons: Vasanta, Grishma, Varsha, Sharada, Hemanta, and Shishira. This calendar fits north India well, but doesn’t really apply to the south, where seasons barely change.(NCERT 11)
Rainfall Zones and Retreating-Monsoon Cyclones
- India’s Average India gets about 125 cm of rain a year on average, but this hides huge regional gaps.(NCERT 11)
- Wettest Zone The west coast, the Western Ghats, and the hills of Meghalaya all get over 200 cm a year. Mawsynram, in the Khasi Hills, holds the world record for average annual rainfall, at around 11,872 mm.(NCERT 11)
- Driest Zones Western Rajasthan, Ladakh, and parts of the interior Peninsula get under 50 cm a year. This is barely a third of the national average.(NCERT 11)
- Retreating-Monsoon Cyclones October and November bring cyclones from the Andaman Sea that cross the southern Peninsula’s east coast. The crowded deltas of the Godavari, Krishna, and Kaveri are their favourite, most damaging targets.(NCERT 11)
📝 Exam Point of View
Exam Point of View: Jet Streams
- Real PYQ SSC CGL 2024, General Awareness asked at what latitude the easterly jet stream blows over peninsular India in summer. The answer is 14°N — this is the jet stream that helps trigger the monsoon’s sudden “burst.”
- Real PYQ CDS I 2017, General Knowledge asked which statement about jet streams was NOT correct. The trap: the polar front jet is actually strongest in winter, not summer, when it wrongly seems to make more intuitive sense.
- The Pattern Jet-stream questions test one specific number or season against your instinct. Learn the easterly jet’s 14°N summer position and the polar front jet’s winter peak as a paired fact, not two separate ones.
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