India is the size of Western Europe and the climate varies as wildly as that comparison suggests. December in Goa is a perfect 28 C with cobalt skies; the same December morning in Leh is minus 15 C and the high passes are snowbound. The mistake most first-time visitors make is asking "when is the best time to visit India" rather than "when is the best time to visit the specific India I want to see". The honest answer below, region by region, will save more disappointment than any other travel article on this site.

North India (Delhi, Rajasthan, Agra, Varanasi) - October to March

This is the classic North Indian high season and the only practical window for the Golden Triangle and Rajasthan palace tour.

October: warm days (28 to 32 C), comfortable nights, post-monsoon greenery. The single best month if you can time it - festivals (Dussehra, Diwali) usually fall in October or early November.

November to February: the textbook high season. Days 22 to 28 C, nights 8 to 14 C. Bring layers for desert evenings in Rajasthan. Delhi smog can be severe from late October to early December - check AQI forecasts and bring N95 masks.

March: warming up to 30 to 35 C. Holi falls in early or mid-March - the most colourful festival in the world.

April to June: brutally hot. Rajasthan hits 45 C, Delhi 42 C. Hotels offer 60 to 70 percent discounts but the heat is genuinely dangerous. Only experienced travellers should attempt north India in May.

July to September: the southwest monsoon. Spectacular skies, lush landscapes, but persistent rain (especially in Mumbai and along the Ghats), occasional flooding, and most palace tours suspend.

South India (Kerala, Goa, Tamil Nadu, Karnataka) - November to March

South India runs on a different monsoon schedule from the north.

November to February: dry, warm, low humidity (24 to 30 C). The textbook window for Kerala backwaters, Goa beaches and the Tamil temple circuit. December to early January is peak high season - prices double and beach shacks book out 6 weeks ahead.

March to May: warming and increasingly humid. Hill stations like Munnar and Coorg become attractive escapes from the coast.

June to September: the southwest monsoon hits Kerala, Goa and Karnataka hard. Goa shacks dismantle. Kerala backwater operators suspend most overnight cruises. The Western Ghats are dramatic but constantly wet.

October to November: the northeast monsoon affects Tamil Nadu and the southeast coast. Chennai and Pondicherry get heavy rain. Kerala and Goa are emerging into the high season.

Himalayas (Ladakh, Spiti, Himachal, Uttarakhand) - June to September

The Himalayan window is short and non-negotiable.

June to September: the only practical window for Ladakh. The Manali to Leh road opens in late May and closes by mid-October. High lakes (Pangong, Tso Moriri) are accessible only in this window.

October: shoulder month. Days clear and crisp but nights drop below freezing. Most road traffic suspends after mid-October.

November to April: Ladakh is closed to road traffic. Flights to Leh continue but the high lakes are inaccessible. The Chadar trek on the frozen Zanskar river runs January and February for serious adventurers.

For Himachal hill stations (Shimla, Manali, Dharamshala): March to June is the warm-weather window; September and October for autumn clarity; December to February for snow.

Northeast India (Meghalaya, Assam, Sikkim, Arunachal) - October to April

The northeast follows a different rhythm again.

October to April: dry, clear skies, comfortable temperatures (15 to 25 C). The textbook window for tea garden visits in Assam, Kaziranga rhino safaris, the Living Root Bridges of Meghalaya and the monasteries of Sikkim and Tawang.

May to September: the northeast is the wettest region on earth. Cherrapunji and Mawsynram in Meghalaya record over 11 metres of annual rainfall. The Living Root Bridges and waterfalls are at their most spectacular in May, June and September if you can tolerate constant rain.

The Festivals That Should Shape Your Dates

  • Diwali (October or November): the festival of lights. Spectacular nationally; book hotels 4 months ahead. North India is the heartland.
  • Holi (early or mid-March): the festival of colours. Most spectacular in Mathura, Vrindavan and Jaipur. Wear clothes you are willing to throw out.
  • Pushkar Camel Fair (early November): 50,000 camels and 200,000 pilgrims gather at the Brahma temple lake in Rajasthan. One of the world's great gatherings.
  • Goa Christmas and New Year: Goa is half-Catholic and the Christmas-to-Epiphany period is the year's biggest party. Book 4 months ahead.
  • Ganga Sagar Mela (mid-January): the second-largest annual Hindu pilgrimage, on Sagar Island in West Bengal.
  • Kumbh Mela: rotates between four cities on a 12-year cycle. The next Maha Kumbh in Prayagraj is in 2025; the next Ardh Kumbh in 2031.
  • Hemis Tsechu (June or July): the largest monastery festival in Ladakh.
  • Onam (August or September): the Kerala harvest festival - flower mandalas, snake-boat races, the famous Onasadya feast.

The Practical Bottom Line

For a first trip to India, the bullseye window is late October to early February, focusing on the Golden Triangle, Rajasthan and Kerala. For a second trip add either March (for Holi and Goa) or June to September for Ladakh and the Himalayas. For a photography trip aim for October to mid-November (post-monsoon clarity, festivals, the best light of the year). Pre-book private drivers, festival tour passes and luxury hotels 3 to 6 months ahead for the November to February high season - the famous palace hotels routinely sell out.