Munro batted through the innings, smashing 109 runs off 58 deliveries.
Given a spot in the starting XI on Saturday following Ashish Nehra's retirement, Siraj had a baptism with fire in Rajkot as New Zealand's batsmen made merry.
Munro put on 105 for the first wicket with Martin Guptill (45) as the visitors plundered the Indian attack around the park.
A second T20I century for Colin Munro, coming off just 54 balls. His blistering knock ensured New Zealand post a huge total of 196 runs with a loss two wickets on the board after 20 overs.
As the Indian captain turned 29 on Sunday, the skipper's friends, fans, colleagues, including both former and current cricketers did not miss an opportunity of showering their love and wishing him on his special day. Trent Boult struck twice in his first over to get rid of first Shikhar Dhawan and then Rohit Sharma cheaply. It poured fours and sixes nearly at will and soon it was not a question of how to get rid of them, but how to stop the flow of runs as no bowler was making any impact.
Virat Kohli wasn't disappointed by losing the toss. Hardik Pandya who came in next couldn't trouble the scorers much after he didn't read a wrong-un from Ish Sodhi and got bowled. Captain Virat Kohli did keep India's hopes alive with a quickfire 65 off 452 balls, the asking rate just kept climbing.