I'm travelling India for a few weeks. We plan on doing a few overnight trips from New Delhi and do not want to carry all our luggage with us. We don't have anything really valuable but it would be very inconvenient if all our clothes went missing.
If you'll be traveling on train from New Delhi, then you can use the cloak rooms and safety lockers available at New Delhi railway station.
You will have to produce your train ticket, and Identity card (this is needed at many stations). There is a nominal hourly rate charge, which is calculated per piece of luggage. Your luggage must be locked.
The current rates for using Cloak rooms and Storage lockers:
Duration Cloak Room Storage Locker For first 24 hours or part thereof Rs 15 per package Rs 20 For each subsequent 24 hours or part thereof Rs 20 per package Rs 30
If you are using the Delhi Airport Metro Express (at the New Delhi station), there is a cloakroom just outside the barriers. Bag does not need to be locked. 100INR up to 4 hours. Longer durations also possible (sorry, not sure of price).