Best time: not earlier than october
Golden Triangle: Delhi > Agra > Jaipur > Delhi

You will definitely enjoy the trip to India. I guess, this is your first time. I also have visited India first time as a tourist and my trip was Golden Triangle too. It’s now i live in India.

Well in Agra, there is not much to see except Taj Mahal. My advice is to see the masterpiece two times - once in a day time and in the evening. You will see the difference, as in the evening they turn on the lights all around the Taj and it looks gorgeous.

Jaipur is a wonderful place with beautiful landscape. There you will see the Fort, where you can ride the elephant! If you ride one, so my advice is to sit closer to his tail, not to the head, because… each time elephants meet each they may split on you from their trunks (that had happened to my friend).

Delhi is the capital, many things to see. Many temples, especially you will like Lotus temple - it looks great!

In any case, i wish you to have a nice time and enjoy!
Best of luck!

December

Best time to travel India is from October to March but this is the time when accommodation prices are higher. The best deal you can get on this link pls check and if you need more details and other itineraries pls mail

Well I guess that you are coming from a western country.So,I would advice that you come in the months of november-beginning of march in order to enjoy your trip without bothering about the heat.At this time of the year,esp. in dec-january,northern India is quite cold with temps dropping to 4-5 deg. celsius,unless,ofcourse,it is influenced by global warming.

best months to visit india are january, february and august& september.