 Mason was elected a Fellow of the Royal Society (FRS) in 1965 and in 1972 received their Rumford Medal.He was Treasurer of the Society from 1976 to 1986, gave their 1990 Rutherford Memorial Lecture in Canada and in 1991 received their Royal Medal.In 1991 Mason also received an Honorary Doctorate from Heriot-Watt University

In 1973, he was made a companion of the Order of the Bath and in 1979 was knighted for his services to meteorology.