The spinner received the award after an incredible haul of 17 wickets in the two-match series to help the Proteas to a comprehensive clean sweep, their first Test series victory in India 25 years.
Harmer returned figures of 4-30 and 4-21 in the series opener in Kolkata, followed by 3-64 and a staggering 6-37 in the second match in Guwahati, ending the series with his 17-wicket haul coming at an average of 8.94 and an economy of 1.91.
The 36-year-old only returned to international cricket after an eight-year absence for the Proteas' Test matches in Pakistan in October this year.
"It's a privilege to be named the ICC Men's Player of the Month for November," Harmer said.
"Playing for my country is a dream come true and anything else that comes from it as a result is a bonus.
"I share this award with my teammates, coaches and support staff and dedicate it to my family who allow me to go out and live my dream, often having to leave them at home to do so.
"It's a privilege to be a part of the Proteas team and I hope to enjoy many more successful seasons with this remarkable group of people."
South Africa's U19 men's side fell to a 12-run (DLS system) defeat to Sri Lanka after being bowled out in just 33 and a half overs in their U19 Cricket World Cup warm-up match.
Dale Steyn has questioned South Africa's decision to leave Ottneil Baartman out of their T20 World Cup squad, despite the pacer's outstanding form in the SA20.
Ottneil Baartman has put being left out of the Proteas squad for the T20 World Cup firmly behind him as he continues to impress for the Paarl Royals in the SA20.
Jason Smith says he will bring versatility to the Proteas batting order after being included in the squad for the T20 World Cup that will start on 7 February and will be co-hosted in India and Sri Lanka.
