Delhi & the north is in an easy stretch right now, October to November. Nothing extreme is running: pack for the temperature and stop worrying about the season.
Going in January
Cold seasonDecember to January
Genuinely cold mornings and dense fog that delays trains and flights. Days are pleasant; dawn is not.
What this means for your bag
Layers, not one thick coat
Three thin layers beat one heavy one: they cover a wider range and pack smaller. A base layer, a fleece and a shell.
See the Winter Warmth Kit packSomething genuinely windproof
Wind is what makes the cold unbearable here, and an umbrella is useless in it. A hood that closes, and gloves.
See the Weather Protection pack
Packing for Delhi & the north?
Build a packing plan around the season you are actually travelling in.
Seasonal ranges are typical, not guarantees — a monsoon can arrive early and a dry season can break. Check the forecast before you seal the bag.