mˈʌnɹoʊ stˈʌdid æɾ ˈɔːklənd ɡɹˈæmɚ skˈuːl ænd ðə jˌuːnɪvˈɜːsᵻɾi ʌv ˈɔːklənd, wˌɛɹ hiː ɡɹˈædjuːˌeɪɾᵻd wɪð ɐ mˈæstɚɹ ʌv lˈɔːz ɪn nˈaɪntiːnhˈʌndɹɪd twˈɛnti θɹˈiː.
Munro studied at Auckland Grammar School and the University of Auckland, where he graduated with a Master of Laws in 1923.